In range-based for-loops, prefer splitting after ":".

Before:
for (const aaaaaaaaaaaaaaaaaaaaa &
         aaaaaaaaa : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}

After:
for (const aaaaaaaaaaaaaaaaaaaaa &aaaaaaaaa :
     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176087 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Format/TokenAnnotator.cpp

@@ -886,7 +886,7 @@ unsigned TokenAnnotator::splitPenalty(const AnnotatedLine &Line,
 
   if (Left.Type == TT_RangeBasedForLoopColon ||
       Left.Type == TT_InheritanceColon)
-    return 5;
+    return 2;
 
   if (Right.is(tok::arrow) || Right.is(tok::period)) {
     if (Line.Type == LT_BuilderTypeCall)

unittests/Format/FormatTest.cpp

@@ -318,6 +318,8 @@ TEST_F(FormatTest, RangeBasedForLoops) {
                "     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}");
   verifyFormat("for (auto aaaaaaaaaaaaaaaaaaaaa :\n"
                "     aaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaa, aaaaaaaaaaaaa)) {\n}");
+  verifyFormat("for (const aaaaaaaaaaaaaaaaaaaaa &aaaaaaaaa :\n"
+               "     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}");
 }
 
 TEST_F(FormatTest, FormatsWhileLoop) {
@@ -601,10 +603,10 @@ TEST_F(FormatTest, CommentsInStaticInitializers) {
                    "      b\n"
                    "}"));
   EXPECT_EQ("S s = { a, b };", format("S s = {\n"
-            "  a,\n"
-            "\n"
-            "  b\n"
-            "};"));
+                                      "  a,\n"
+                                      "\n"
+                                      "  b\n"
+                                      "};"));
 }
 
 //===----------------------------------------------------------------------===//