[clang-format] Fix end-of-file comments text proto formatting
Summary:
The case of end-of-file comments was formatted badly:
```
key: value
# end-of-file comment
```
This patch fixes that formatting:
```
key: value
# end-of-file comment
```
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D48539
llvm-svn: 335449
diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index e1fa72e..e5afa12 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -303,6 +303,18 @@
else
parseLevel(/*HasOpeningBrace=*/false);
// Make sure to format the remaining tokens.
+ //
+ // LK_TextProto is special since its top-level is parsed as the body of a
+ // braced list, which does not necessarily have natural line separators such
+ // as a semicolon. Comments after the last entry that have been determined to
+ // not belong to that line, as in:
+ // key: value
+ // // endfile comment
+ // do not have a chance to be put on a line of their own until this point.
+ // Here we add this newline before end-of-file comments.
+ if (Style.Language == FormatStyle::LK_TextProto &&
+ !CommentsBeforeNextToken.empty())
+ addUnwrappedLine();
flushComments(true);
addUnwrappedLine();
}