Squashed commit of the following:

commit c5a0d0f7394aa742fa336fff7e7c1d3049761868
Merge: 8c4991ba3e f8ff8c8760
Author: William Cheng <wing328hk@gmail.com>
Date:   Tue Aug 17 18:28:12 2021 +0800

    Merge branch 'mustache-linting' of https://github.com/NathanBaulch/openapi-generator into NathanBaulch-mustache-linting

commit f8ff8c8760
Author: Nathan Baulch <nathan.baulch@gmail.com>
Date:   Thu Aug 5 14:12:47 2021 +1000

    Reorder tags that handle missing values

commit f5d8a33709
Author: Nathan Baulch <nathan.baulch@gmail.com>
Date:   Thu Aug 5 14:08:59 2021 +1000

    Use dot notation where possible

commit 493d14921e
Author: Nathan Baulch <nathan.baulch@gmail.com>
Date:   Thu Aug 5 14:10:49 2021 +1000

    Remove empty tags

commit 32480dc53f
Author: Nathan Baulch <nathan.baulch@gmail.com>
Date:   Thu Aug 5 10:41:58 2021 +1000

    Remove redundant sections

commit a8edabd722
Author: Nathan Baulch <nathan.baulch@gmail.com>
Date:   Wed Aug 4 22:02:22 2021 +1000

    Trim extra EOF new lines

commit e89bd7458e
Author: Nathan Baulch <nathan.baulch@gmail.com>
Date:   Wed Aug 4 21:59:26 2021 +1000

    Trim trailing whitespace

samples/client/petstore/java/okhttp-gson-dynamicOperations/src/main/java/org/openapitools/client/ProgressResponseBody.java

@@ -68,5 +68,3 @@ public class ProgressResponseBody extends ResponseBody {
         };
     }
 }
-
-

samples/client/petstore/java/okhttp-gson-dynamicOperations/src/main/java/org/openapitools/client/auth/OAuthFlow.java

@@ -16,7 +16,7 @@ package org.openapitools.client.auth;
 @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
 public enum OAuthFlow {
     accessCode, //called authorizationCode  in OpenAPI 3.0
-    implicit, 
+    implicit,
     password,
     application //called clientCredentials in OpenAPI 3.0
 }