Formatting: exactly one space after for keyword

idea/src/org/jetbrains/jet/plugin/formatter/JetFormattingModelBuilder.java

@@ -88,6 +88,8 @@ public class JetFormattingModelBuilder implements FormattingModelBuilder {
                 .afterInside(LT, TYPE_ARGUMENT_LIST).spaces(0)
                 .beforeInside(GT, TYPE_ARGUMENT_LIST).spaces(0)
 
+                .betweenInside(FOR_KEYWORD, LPAR, FOR).spacing(1, 1, 0, false, 0)
+
                 // TODO: Ask for better API
                 // Type of the declaration colon
                 .beforeInside(COLON, PROPERTY).spaceIf(jetSettings.SPACE_BEFORE_TYPE_COLON)

idea/testData/formatter/ForSpacing.after.kt

@@ -0,0 +1,8 @@
+fun f() {
+    for (i in array(1, 2)) {
+    }
+    for (i in array(1, 2)) {
+    }
+    for (i in array(1, 2)) {
+    }
+}

idea/testData/formatter/ForSpacing.kt

@@ -0,0 +1,9 @@
+fun f() {
+    for(i in array(1, 2)) {
+    }
+    for  (i in array(1, 2)) {
+    }
+    for
+    (i in array(1, 2)) {
+    }
+}

idea/tests/org/jetbrains/jet/formatter/JetFormatterTestGenerated.java

@@ -67,6 +67,11 @@ public class JetFormatterTestGenerated extends AbstractJetFormatterTest {
         doTest("idea/testData/formatter/ForNoBraces.kt");
     }
     
+    @TestMetadata("ForSpacing.kt")
+    public void testForSpacing() throws Exception {
+        doTest("idea/testData/formatter/ForSpacing.kt");
+    }
+    
     @TestMetadata("FunctionCallParametersAlign.kt")
     public void testFunctionCallParametersAlign() throws Exception {
         doTest("idea/testData/formatter/FunctionCallParametersAlign.kt");