fix mustache template

Author: Picazsoo

modules/openapi-generator/src/main/resources/kotlin-spring/dataClass.mustache

@@ -33,8 +33,8 @@
 }}{{^parent}}{{! no newline
   }}{{#serializableModel}}{{! no newline
       }}{{^vendorExtensions.x-kotlin-implements}} : Serializable{{/vendorExtensions.x-kotlin-implements}}{{! no newline
-      }}{{#vendorExtensions.x-kotlin-implements}} : Serializable, {{! no newline
-      }}{{#-first}}{{{.}}}{{/-first}}{{! no newline
+      }}{{#vendorExtensions.x-kotlin-implements}}{{! no newline
+      }}{{#-first}} : Serializable, {{{.}}}{{/-first}}{{! no newline
       }}{{^-first}}, {{{.}}}{{/-first}}{{! no newline
       }}{{/vendorExtensions.x-kotlin-implements}}{{! no newline
   }}{{/serializableModel}}{{! no newline

samples/server/petstore/kotlin-springboot-x-kotlin-implements/.openapi-generator/FILES

@@ -1,4 +1,3 @@
-.openapi-generator-ignore
 README.md
 build.gradle.kts
 gradle/wrapper/gradle-wrapper.jar
@@ -28,6 +27,3 @@ src/main/kotlin/org/openapitools/model/Pet.kt
 src/main/kotlin/org/openapitools/model/Tag.kt
 src/main/kotlin/org/openapitools/model/User.kt
 src/main/resources/application.yaml
-src/test/kotlin/org/openapitools/api/PetApiTest.kt
-src/test/kotlin/org/openapitools/api/StoreApiTest.kt
-src/test/kotlin/org/openapitools/api/UserApiTest.kt

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

@@ -47,7 +47,7 @@ data class Pet(
 
     @field:Valid
     @get:JsonProperty("color") val color: Color? = null
-) : Serializable, com.some.pack.Named : Serializable, , com.some.pack.WithCategory : Serializable, , com.some.pack.WithDefaultMethods {
+) : Serializable, com.some.pack.Named, com.some.pack.WithCategory, com.some.pack.WithDefaultMethods {
 
     /**
     * pet status in the store