fix possible premature code block ending in markdown

Author: Picazsoo

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java

@@ -487,6 +487,10 @@ protected ImmutableMap.Builder<String, Lambda> addMustacheLambdas() {
                         .replace(">", "&gt;")
                         .replace("$", "\\$")
                         .replace("|", "\\|")
+                        .replace("\r\n", " ")
+                        .replace("\n", " ")
+                        .replace("\r", " ")))
+                .put("collapseNewlines", (fragment, writer) -> writer.write(fragment.execute()
                         .replace("\r\n", " ")
                         .replace("\n", " ")
                         .replace("\r", " ")));

modules/openapi-generator/src/main/resources/kotlin-client/api_doc.mustache

@@ -27,7 +27,7 @@ All URIs are relative to *{{basePath}}*
 {{! TODO: Auth method documentation examples}}
 val apiInstance = {{{classname}}}()
 {{#allParams}}
-val {{{paramName}}} : {{{dataType}}} = {{{example}}} // {{{dataType}}} | {{{unescapedDescription}}}
+val {{{paramName}}} : {{{dataType}}} = {{{example}}} // {{{dataType}}} | {{#lambda.collapseNewlines}}{{{unescapedDescription}}}{{/lambda.collapseNewlines}}
 {{/allParams}}
 try {
     {{#returnType}}val result : {{{returnType}}}{{#nullableReturnType}}?{{/nullableReturnType}} = {{/returnType}}apiInstance.{{{operationId}}}({{#allParams}}{{{paramName}}}{{^-last}}, {{/-last}}{{/allParams}}){{#returnType}}

modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-retrofit2/api_doc.mustache

@@ -35,7 +35,7 @@ apiClient.setBearerToken("TOKEN")
 {{/authMethods}}
 val webService = apiClient.createWebservice({{{classname}}}::class.java)
 {{#allParams}}
-val {{{paramName}}} : {{{dataType}}} = {{{example}}} // {{{dataType}}} | {{{unescapedDescription}}}
+val {{{paramName}}} : {{{dataType}}} = {{{example}}} // {{{dataType}}} | {{#lambda.collapseNewlines}}{{{unescapedDescription}}}{{/lambda.collapseNewlines}}
 {{/allParams}}
 
 {{#useCoroutines}}

modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-volley/api_doc.mustache

@@ -35,7 +35,7 @@ apiClient.setBearerToken("TOKEN")
 {{/authMethods}}
 val webService = apiClient.createWebservice({{{classname}}}::class.java)
 {{#allParams}}
-val {{{paramName}}} : {{{dataType}}} = {{{example}}} // {{{dataType}}} | {{{unescapedDescription}}}
+val {{{paramName}}} : {{{dataType}}} = {{{example}}} // {{{dataType}}} | {{#lambda.collapseNewlines}}{{{unescapedDescription}}}{{/lambda.collapseNewlines}}
 {{/allParams}}
 
 {{#useCoroutines}}

modules/openapi-generator/src/main/resources/kotlin-misk/api_doc.mustache

@@ -27,7 +27,7 @@ Method | HTTP request | Description
 {{! TODO: Auth method documentation examples}}
 val apiInstance = {{{classname}}}()
 {{#allParams}}
-val {{{paramName}}} : {{{dataType}}} = {{{example}}} // {{{dataType}}} | {{{unescapedDescription}}}
+val {{{paramName}}} : {{{dataType}}} = {{{example}}} // {{{dataType}}} | {{#lambda.collapseNewlines}}{{{unescapedDescription}}}{{/lambda.collapseNewlines}}
 {{/allParams}}
 try {
     {{#returnType}}val result : {{{returnType}}} = {{/returnType}}apiInstance.{{{operationId}}}({{#allParams}}{{{paramName}}}{{^-last}}, {{/-last}}{{/allParams}}){{#returnType}}

modules/openapi-generator/src/main/resources/kotlin-server/api_doc.mustache

@@ -27,7 +27,7 @@ Method | HTTP request | Description
 {{! TODO: Auth method documentation examples}}
 val apiInstance = {{{classname}}}()
 {{#allParams}}
-val {{{paramName}}} : {{{dataType}}} = {{{example}}} // {{{dataType}}} | {{{unescapedDescription}}}
+val {{{paramName}}} : {{{dataType}}} = {{{example}}} // {{{dataType}}} | {{#lambda.collapseNewlines}}{{{unescapedDescription}}}{{/lambda.collapseNewlines}}
 {{/allParams}}
 try {
     {{#returnType}}val result : {{{returnType}}} = {{/returnType}}apiInstance.{{{operationId}}}({{#allParams}}{{{paramName}}}{{^-last}}, {{/-last}}{{/allParams}}){{#returnType}}