Formatter: now always adds space between reference expression and function literal. Test is included.

#KT-3932 fixed

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

@@ -113,6 +113,8 @@ public class JetFormattingModelBuilder implements FormattingModelBuilder {
                 .beforeInside(LBRACE, WHEN).spacing(1, 1, 0, true, 0)          //omit blank lines before '{' in 'when' statement
 
                 .aroundInside(ARROW, FUNCTION_TYPE).spaceIf(jetSettings.SPACE_AROUND_FUNCTION_TYPE_ARROW)
+
+                .betweenInside(REFERENCE_EXPRESSION, FUNCTION_LITERAL_EXPRESSION, CALL_EXPRESSION).spaces(1)
                 ;
     }
 

idea/testData/formatter/ReferenceExpressionFunctionLiteral.kt

@@ -0,0 +1,3 @@
+fun f() {
+    array(1, 2, 3).map{ v -> v }
+}

idea/testData/formatter/ReferenceExpressionFunctionLiteral_after.kt

@@ -0,0 +1,3 @@
+fun f() {
+    array(1, 2, 3).map { v -> v }
+}

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

@@ -147,6 +147,10 @@ public class JetFormatterTest extends AbstractJetFormatterTest {
         doTestWithInvert();
     }
 
+    public void testReferenceExpressionFunctionLiteral() throws Exception {
+        doTest();
+    }
+
     @Override
     public void doTest() throws Exception {
         String originalFileText = AbstractJetFormatterTest.loadFile(getTestName(false) + ".kt");