correct indent on enter in multiline non-g-strings

plugins/groovy/src/org/jetbrains/plugins/groovy/lang/editor/actions/GroovyEnterHandler.java

@@ -247,7 +247,7 @@ public class GroovyEnterHandler extends EnterHandlerDelegateAdapter {
         EditorModificationUtil.insertStringAtCaret(editor, "\n");
       }
       else {
-        EditorModificationUtil.insertStringAtCaret(editor, "\n");
+        originalHandler.execute(editor, dataContext);
       }
       return true;
     }

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/formatter/EnterActionTest.groovy

@@ -77,6 +77,7 @@ public class EnterActionTest extends GroovyFormatterTestCase {
   public void testGstring7() throws Throwable { doTest(); }
   public void testGstring8() throws Throwable { doTest(); }
   public void testGstring9() throws Throwable { doTest(); }
+  public void testMultilineIndent() throws Throwable { doTest(); }
   public void testSpaces1() throws Throwable { doTest(); }
   public void testString1() throws Throwable { doTest(); }
   public void testString2() throws Throwable { doTest(); }

plugins/groovy/testdata/groovy/enterAction/multilineIndent.test

@@ -0,0 +1,12 @@
+'''
+class Foo {
+  void foo() {}<caret>
+}
+'''
+-----
+'''
+class Foo {
+  void foo() {}
+  <caret>
+}
+'''