[Kotlin]Formatted according to the kotlin style guide (#5196)

* Do not put a space
https://kotlinlang.org/docs/reference/coding-conventions.html#horizontal-whitespace

* Use 4 spaces for indentation
https://kotlinlang.org/docs/reference/coding-conventions.html#formatting

* Put spaces around the `=` sign
https://kotlinlang.org/docs/reference/coding-conventions.html#method-call-formatting

* Indent the expression body by 4 spaces
https://kotlinlang.org/docs/reference/coding-conventions.html#expression-body-formatting

* run ./bin/kotlin-springboot-petstore-all.sh

samples/openapi3/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 })
 }

samples/openapi3/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,
 @get:Pattern(regexp="^[a-zA-Z0-9]+[a-zA-Z0-9\\.\\-_]*[a-zA-Z0-9]+$") 
-        @ApiModelProperty(example = "null", value = "")
-        @JsonProperty("name") val name: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "")
+    @JsonProperty("name") val name: kotlin.String? = null
 ) {
 
 }

samples/openapi3/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/InlineObject.kt

@@ -16,13 +16,13 @@ import io.swagger.annotations.ApiModelProperty
  * @param name Updated name of the pet
  * @param status Updated status of the pet
  */
-data class InlineObject (
+data class InlineObject(
 
-        @ApiModelProperty(example = "null", value = "Updated name of the pet")
-        @JsonProperty("name") val name: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "Updated name of the pet")
+    @JsonProperty("name") val name: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "Updated status of the pet")
-        @JsonProperty("status") val status: kotlin.String? = null
+    @ApiModelProperty(example = "null", value = "Updated status of the pet")
+    @JsonProperty("status") val status: kotlin.String? = null
 ) {
 
 }

samples/openapi3/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/InlineObject1.kt

@@ -16,13 +16,13 @@ import io.swagger.annotations.ApiModelProperty
  * @param additionalMetadata Additional data to pass to server
  * @param file file to upload
  */
-data class InlineObject1 (
+data class InlineObject1(
 
-        @ApiModelProperty(example = "null", value = "Additional data to pass to server")
-        @JsonProperty("additionalMetadata") val additionalMetadata: kotlin.String? = null,
+    @ApiModelProperty(example = "null", value = "Additional data to pass to server")
+    @JsonProperty("additionalMetadata") val additionalMetadata: kotlin.String? = null,
 
-        @ApiModelProperty(example = "null", value = "file to upload")
-        @JsonProperty("file") val file: org.springframework.core.io.Resource? = null
+    @ApiModelProperty(example = "null", value = "file to upload")
+    @JsonProperty("file") val file: org.springframework.core.io.Resource? = null
 ) {
 
 }

samples/openapi3/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
 ) {
 
 }

samples/openapi3/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
 ) {
 
     /**

samples/openapi3/server/petstore/kotlin-springboot/src/main/kotlin/org/openapitools/model/Pet.kt

@@ -16,34 +16,34 @@ import io.swagger.annotations.ApiModelProperty
 
 /**
  * A pet for sale in the pet store
- * @param id 
- * @param category 
  * @param name 
  * @param photoUrls 
+ * @param id 
+ * @param category 
  * @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
 ) {
 
     /**

samples/openapi3/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
 ) {
 
 }

samples/openapi3/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
 ) {
 
 }