IDE-2477: Small fix in comments

Author: Quang Tran

plugins/eu.numberfour.n4jsx/src/eu/numberfour/n4jsx/resource/N4JSXTranspilableFileExtensionsProvider.java

@@ -7,7 +7,7 @@
 import eu.numberfour.n4jsx.N4JSXGlobals;
 
 /**
- * This provider enables .n4js and .js for generated source
+ * This provider enables .n4jsx and .jsx for generated source
  */
 public class N4JSXTranspilableFileExtensionsProvider
 		implements TranspilableFileExtensionsProvider {