gstring reformatting fix

plugins/groovy/src/org/jetbrains/plugins/groovy/formatter/GroovyBlockGenerator.java

@@ -100,6 +100,19 @@ public class GroovyBlockGenerator implements GroovyElementTypes {
 
     }
 
+    //for gstrings
+    if (block.getNode().getElementType() == GSTRING) {
+      final ArrayList<Block> subBlocks = new ArrayList<Block>();
+      ASTNode children[] = getGroovyChildren(node);
+      ASTNode prevChildNode = null;
+      for (ASTNode childNode : children) {
+        final Indent indent = GroovyIndentProcessor.getChildIndent(block, prevChildNode, childNode);
+        subBlocks.add(new GroovyBlock(childNode, myAlignment, indent, myWrap, mySettings));
+        prevChildNode = childNode;
+      }
+      return subBlocks;
+    }
+
     //For nested selections
     if (NESTED.contains(block.getNode().getElementType()) &&
         blockPsi.getParent() != null &&

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/formatter/FormatterTest.java

@@ -65,6 +65,7 @@ public class FormatterTest extends GroovyFormatterTestCase {
   public void testFor2() throws Throwable { doTest(); }
   public void testGbegin1() throws Throwable { doTest(); }
   public void testGrvy1637() throws Throwable { doTest(); }
+  public void testGString1() throws Throwable { doTest(); }
   public void testMap6() throws Throwable { doTest(); }
   public void testMeth1() throws Throwable { doTest(); }
   public void testMeth2() throws Throwable { doTest(); }

plugins/groovy/testdata/groovy/formatter/GString1.test

@@ -0,0 +1,3 @@
+def a = "${1+2} ${2}"
+-----
+def a = "${1 + 2} ${2}"