[formatting] fix else statement formatting

Author: zolotov

src/com/goide/formatter/GoFormattingModelBuilder.java

@@ -87,6 +87,7 @@ private static SpacingBuilder createSpacingBuilder(@NotNull CodeStyleSettings se
       .after(FOR).spaces(1)
       .after(IF).spaces(1)
       .after(ELSE).spaces(1)
+      .before(ELSE_STATEMENT).spaces(1)
       .after(CASE).spaces(1)
       .after(RANGE).spaces(1)
       .after(SWITCH).spaces(1)

testData/formatting/elseStatement-after.go

@@ -0,0 +1,11 @@
+package bar
+
+func main() {
+	if (true) {
+
+	} else {
+		true
+	}
+
+	if {} else {}
+}

testData/formatting/elseStatement.go

@@ -0,0 +1,11 @@
+package bar
+
+func main() {
+	if (true) {
+
+	}else{
+		true
+	}
+
+	if {}                else       {}
+}

tests/com/goide/formatter/GoFormatterTest.java

@@ -40,6 +40,7 @@ protected String getBasePath() {
   public void testVarDeclaration()                  { doTest(); }
   public void testBreakLines()                      { doTest(); }
   public void testCommentIndentation()              { doTest(); }
+  public void testElseStatement()                   { doTest(); }
 
   private void doTest() { doTest(null); }