Formatting: exactly one space after if keyword

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

@@ -89,6 +89,7 @@ public class JetFormattingModelBuilder implements FormattingModelBuilder {
                 .beforeInside(GT, TYPE_ARGUMENT_LIST).spaces(0)
 
                 .betweenInside(FOR_KEYWORD, LPAR, FOR).spacing(1, 1, 0, false, 0)
+                .betweenInside(IF_KEYWORD, LPAR, IF).spacing(1, 1, 0, false, 0)
 
                 // TODO: Ask for better API
                 // Type of the declaration colon

idea/testData/formatter/IfSpacing.after.kt

@@ -0,0 +1,8 @@
+fun f() {
+    if (1 == 2) {
+    }
+    if (1 == 2) {
+    }
+    if (1 == 2) {
+    }
+}

idea/testData/formatter/IfSpacing.kt

@@ -0,0 +1,9 @@
+fun f() {
+    if   (1 == 2) {
+    }
+    if(1 == 2) {
+    }
+    if
+    (1 == 2) {
+    }
+}

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

@@ -107,6 +107,11 @@ public class JetFormatterTestGenerated extends AbstractJetFormatterTest {
         doTest("idea/testData/formatter/If.kt");
     }
     
+    @TestMetadata("IfSpacing.kt")
+    public void testIfSpacing() throws Exception {
+        doTest("idea/testData/formatter/IfSpacing.kt");
+    }
+    
     @TestMetadata("KDoc.kt")
     public void testKDoc() throws Exception {
         doTest("idea/testData/formatter/KDoc.kt");