allow to type 'for ' in groovy code without unexpected parentheses

java/java-impl/src/com/intellij/codeInsight/completion/JavaCompletionData.java

@@ -709,7 +709,7 @@ public class JavaCompletionData extends JavaAwareCompletionData {
     return false;
   }
 
-  protected static class OverrideableSpace extends TailTypeDecorator<LookupElement> {
+  public static class OverrideableSpace extends TailTypeDecorator<LookupElement> {
     private final TailType myTail;
 
     public OverrideableSpace(LookupElement keyword, TailType tail) {

plugins/groovy/src/org/jetbrains/plugins/groovy/lang/completion/GroovyCompletionData.java

@@ -21,6 +21,7 @@ import com.intellij.codeInsight.TailType;
 import com.intellij.codeInsight.TailTypes;
 import com.intellij.codeInsight.completion.CompletionParameters;
 import com.intellij.codeInsight.completion.CompletionResultSet;
+import com.intellij.codeInsight.completion.JavaCompletionData;
 import com.intellij.codeInsight.completion.ModifierChooser;
 import com.intellij.codeInsight.lookup.LookupElement;
 import com.intellij.codeInsight.lookup.LookupElementBuilder;
@@ -226,7 +227,7 @@ public class GroovyCompletionData {
 
   private static LookupElement keyword(final String keyword, @NotNull TailType tail) {
     LookupElementBuilder element = LookupElementBuilder.create(keyword).bold();
-    return tail != TailType.NONE ? TailTypeDecorator.withTail(element, tail) : element;
+    return tail != TailType.NONE ? new JavaCompletionData.OverrideableSpace(element, tail) : element;
   }
 
   private static void registerControlCompletion(PsiElement context, CompletionResultSet result) {

plugins/groovy/test/org/jetbrains/plugins/groovy/completion/GroovyCompletionTest.groovy

@@ -1266,6 +1266,13 @@ def foo(Integer a) {
 ''')
   }
 
+  public void testForSpace() {
+    configure('f<caret>')
+    myFixture.completeBasic()
+    myFixture.type 'or '
+    myFixture.checkResult "for <caret>"
+  }
+
   void testInferArgumentTypeFromMethod3() {
     doBasicTest('''\
 def bar(String s) {}