Don't insert a break into include lines with trailing comments.

llvm-svn: 182003

clang/lib/Format/Format.cpp

@@ -777,7 +777,8 @@ private:
     llvm::OwningPtr<BreakableToken> Token;
     unsigned StartColumn = State.Column - Current.FormatTok.TokenLength -
                            UnbreakableTailLength;
-    if (Current.is(tok::string_literal)) {
+    if (Current.is(tok::string_literal) &&
+        Current.Type != TT_ImplicitStringLiteral) {
       // Only break up default narrow strings.
       const char *LiteralData = SourceMgr.getCharacterData(
           Current.FormatTok.getStartOfNonWhitespace());

clang/unittests/Format/FormatTest.cpp

@@ -2894,6 +2894,7 @@ TEST_F(FormatTest, HandlesIncludeDirectives) {
                "#include <a-a>\n"
                "#include < path with space >\n"
                "#include \"abc.h\" // this is included for ABC\n"
+               "#include \"some long include\" // with a comment\n"
                "#include \"some very long include paaaaaaaaaaaaaaaaaaaaaaath\"",
                getLLVMStyleWithColumns(35));