diff --git a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Category.kt b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Category.kt
index f477eb4e7a8..0ff2490b5fe 100644
--- a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Category.kt
+++ b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Category.kt
@@ -16,13 +16,13 @@ import io.swagger.annotations.ApiModelProperty
  * @param id 
  * @param name 
  */
-data class Category (
+data class Category(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") val id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") val id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("name") val name: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("name") val name: kotlin.String? = null
 ) {
 
 }
diff --git a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/ModelApiResponse.kt b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/ModelApiResponse.kt
index 0e86b28e937..a49f0aea068 100644
--- a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/ModelApiResponse.kt
+++ b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/ModelApiResponse.kt
@@ -17,16 +17,16 @@ import io.swagger.annotations.ApiModelProperty
  * @param type 
  * @param message 
  */
-data class ModelApiResponse (
+data class ModelApiResponse(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("code") val code: kotlin.Int? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("code") val code: kotlin.Int? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("type") val type: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("type") val type: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("message") val message: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("message") val message: kotlin.String? = null
 ) {
 
 }
diff --git a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Order.kt b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Order.kt
index 08726893f7d..0e12d03b1f8 100644
--- a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Order.kt
+++ b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Order.kt
@@ -21,25 +21,25 @@ import io.swagger.annotations.ApiModelProperty
  * @param status Order Status
  * @param complete 
  */
-data class Order (
+data class Order(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") val id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") val id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("petId") val petId: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("petId") val petId: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("quantity") val quantity: kotlin.Int? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("quantity") val quantity: kotlin.Int? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("shipDate") val shipDate: java.time.OffsetDateTime? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("shipDate") val shipDate: java.time.OffsetDateTime? = null,
 
-        @ApiModelProperty(example = "null", value = "Order Status")
-        @JsonProperty("status") val status: Order.Status? = null,
+    @ApiModelProperty(example = "null", value = "Order Status")
+    @JsonProperty("status") val status: Order.Status? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("complete") val complete: kotlin.Boolean? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("complete") val complete: kotlin.Boolean? = null
 ) {
 
     /**
diff --git a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Pet.kt b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Pet.kt
index e92ce409479..5d3acb0d2ea 100644
--- a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Pet.kt
+++ b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Pet.kt
@@ -23,27 +23,27 @@ import io.swagger.annotations.ApiModelProperty
  * @param tags 
  * @param status pet status in the store
  */
-data class Pet (
+data class Pet(
 
-        @get:NotNull 
-        @ApiModelProperty(example = "doggie", required = true, value = "")
-        @JsonProperty("name") val name: kotlin.String,
+    @get:NotNull 
+    @ApiModelProperty(example = "doggie", required = true, value = "")
+    @JsonProperty("name") val name: kotlin.String,
 
-        @get:NotNull 
-        @ApiModelProperty(example = "null", required = true, value = "")
-        @JsonProperty("photoUrls") val photoUrls: kotlin.collections.List<kotlin.String>,
+    @get:NotNull 
+    @ApiModelProperty(example = "null", required = true, value = "")
+    @JsonProperty("photoUrls") val photoUrls: kotlin.collections.List<kotlin.String>,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") val id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") val id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("category") val category: Category? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("category") val category: Category? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("tags") val tags: kotlin.collections.List<Tag>? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("tags") val tags: kotlin.collections.List<Tag>? = null,
 
-        @ApiModelProperty(example = "null", value = "pet status in the store")
-        @JsonProperty("status") val status: Pet.Status? = null
+    @ApiModelProperty(example = "null", value = "pet status in the store")
+    @JsonProperty("status") val status: Pet.Status? = null
 ) {
 
     /**
diff --git a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Tag.kt b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Tag.kt
index df04dcd035d..5c6ec4d2968 100644
--- a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Tag.kt
+++ b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/Tag.kt
@@ -16,13 +16,13 @@ import io.swagger.annotations.ApiModelProperty
  * @param id 
  * @param name 
  */
-data class Tag (
+data class Tag(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") val id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") val id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("name") val name: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("name") val name: kotlin.String? = null
 ) {
 
 }
diff --git a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/User.kt b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/User.kt
index 619b2e7c2c3..6f2e9f739ab 100644
--- a/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/User.kt
+++ b/samples/server/petstore/kotlin-springboot-reactive/src/main/kotlin/org/openapitools/model/User.kt
@@ -22,31 +22,31 @@ import io.swagger.annotations.ApiModelProperty
  * @param phone 
  * @param userStatus User Status
  */
-data class User (
+data class User(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") val id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") val id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("username") val username: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("username") val username: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("firstName") val firstName: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("firstName") val firstName: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("lastName") val lastName: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("lastName") val lastName: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("email") val email: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("email") val email: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("password") val password: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("password") val password: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("phone") val phone: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("phone") val phone: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "User Status")
-        @JsonProperty("userStatus") val userStatus: kotlin.Int? = null
+    @ApiModelProperty(example = "null", value = "User Status")
+    @JsonProperty("userStatus") val userStatus: kotlin.Int? = null
 ) {
 
 }
diff --git a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/api/Exceptions.kt b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/api/Exceptions.kt
index 4d8400902aa..44190af7a01 100644
--- a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/api/Exceptions.kt
+++ b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/api/Exceptions.kt
@@ -17,13 +17,13 @@ class DefaultExceptionHandler {
 
     @ExceptionHandler(value = [ApiException::class])
     fun onApiException(ex: ApiException, response: HttpServletResponse): Unit =
-            response.sendError(ex.code, ex.message)
+        response.sendError(ex.code, ex.message)
 
     @ExceptionHandler(value = [NotImplementedError::class])
     fun onNotImplemented(ex: NotImplementedError, response: HttpServletResponse): Unit =
-            response.sendError(HttpStatus.NOT_IMPLEMENTED.value())
+        response.sendError(HttpStatus.NOT_IMPLEMENTED.value())
 
     @ExceptionHandler(value = [ConstraintViolationException::class])
     fun onConstraintViolation(ex: ConstraintViolationException, response: HttpServletResponse): Unit =
-            response.sendError(HttpStatus.BAD_REQUEST.value(), ex.constraintViolations.joinToString(", ") { it.message })
+        response.sendError(HttpStatus.BAD_REQUEST.value(), ex.constraintViolations.joinToString(", ") { it.message })
 }
diff --git a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Category.kt b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Category.kt
index f477eb4e7a8..0ff2490b5fe 100644
--- a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Category.kt
+++ b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Category.kt
@@ -16,13 +16,13 @@ import io.swagger.annotations.ApiModelProperty
  * @param id 
  * @param name 
  */
-data class Category (
+data class Category(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") val id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") val id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("name") val name: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("name") val name: kotlin.String? = null
 ) {
 
 }
diff --git a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/ModelApiResponse.kt b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/ModelApiResponse.kt
index 0e86b28e937..a49f0aea068 100644
--- a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/ModelApiResponse.kt
+++ b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/ModelApiResponse.kt
@@ -17,16 +17,16 @@ import io.swagger.annotations.ApiModelProperty
  * @param type 
  * @param message 
  */
-data class ModelApiResponse (
+data class ModelApiResponse(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("code") val code: kotlin.Int? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("code") val code: kotlin.Int? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("type") val type: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("type") val type: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("message") val message: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("message") val message: kotlin.String? = null
 ) {
 
 }
diff --git a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Order.kt b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Order.kt
index 08726893f7d..0e12d03b1f8 100644
--- a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Order.kt
+++ b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Order.kt
@@ -21,25 +21,25 @@ import io.swagger.annotations.ApiModelProperty
  * @param status Order Status
  * @param complete 
  */
-data class Order (
+data class Order(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") val id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") val id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("petId") val petId: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("petId") val petId: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("quantity") val quantity: kotlin.Int? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("quantity") val quantity: kotlin.Int? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("shipDate") val shipDate: java.time.OffsetDateTime? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("shipDate") val shipDate: java.time.OffsetDateTime? = null,
 
-        @ApiModelProperty(example = "null", value = "Order Status")
-        @JsonProperty("status") val status: Order.Status? = null,
+    @ApiModelProperty(example = "null", value = "Order Status")
+    @JsonProperty("status") val status: Order.Status? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("complete") val complete: kotlin.Boolean? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("complete") val complete: kotlin.Boolean? = null
 ) {
 
     /**
diff --git a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Pet.kt b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Pet.kt
index e92ce409479..5d3acb0d2ea 100644
--- a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Pet.kt
+++ b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Pet.kt
@@ -23,27 +23,27 @@ import io.swagger.annotations.ApiModelProperty
  * @param tags 
  * @param status pet status in the store
  */
-data class Pet (
+data class Pet(
 
-        @get:NotNull 
-        @ApiModelProperty(example = "doggie", required = true, value = "")
-        @JsonProperty("name") val name: kotlin.String,
+    @get:NotNull 
+    @ApiModelProperty(example = "doggie", required = true, value = "")
+    @JsonProperty("name") val name: kotlin.String,
 
-        @get:NotNull 
-        @ApiModelProperty(example = "null", required = true, value = "")
-        @JsonProperty("photoUrls") val photoUrls: kotlin.collections.List<kotlin.String>,
+    @get:NotNull 
+    @ApiModelProperty(example = "null", required = true, value = "")
+    @JsonProperty("photoUrls") val photoUrls: kotlin.collections.List<kotlin.String>,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") val id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") val id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("category") val category: Category? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("category") val category: Category? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("tags") val tags: kotlin.collections.List<Tag>? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("tags") val tags: kotlin.collections.List<Tag>? = null,
 
-        @ApiModelProperty(example = "null", value = "pet status in the store")
-        @JsonProperty("status") val status: Pet.Status? = null
+    @ApiModelProperty(example = "null", value = "pet status in the store")
+    @JsonProperty("status") val status: Pet.Status? = null
 ) {
 
     /**
diff --git a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Tag.kt b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Tag.kt
index df04dcd035d..5c6ec4d2968 100644
--- a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Tag.kt
+++ b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Tag.kt
@@ -16,13 +16,13 @@ import io.swagger.annotations.ApiModelProperty
  * @param id 
  * @param name 
  */
-data class Tag (
+data class Tag(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") val id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") val id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("name") val name: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("name") val name: kotlin.String? = null
 ) {
 
 }
diff --git a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/User.kt b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/User.kt
index 619b2e7c2c3..6f2e9f739ab 100644
--- a/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/User.kt
+++ b/samples/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/User.kt
@@ -22,31 +22,31 @@ import io.swagger.annotations.ApiModelProperty
  * @param phone 
  * @param userStatus User Status
  */
-data class User (
+data class User(
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("id") val id: kotlin.Long? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("id") val id: kotlin.Long? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("username") val username: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("username") val username: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("firstName") val firstName: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("firstName") val firstName: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("lastName") val lastName: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("lastName") val lastName: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("email") val email: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("email") val email: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("password") val password: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("password") val password: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("phone") val phone: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("phone") val phone: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "User Status")
-        @JsonProperty("userStatus") val userStatus: kotlin.Int? = null
+    @ApiModelProperty(example = "null", value = "User Status")
+    @JsonProperty("userStatus") val userStatus: kotlin.Int? = null
 ) {
 
 }