[clang-format] Fix text proto extension scope opening detection

Summary:
This fixes the detection of scope openers in text proto extensions; previously
they were not detected correctly leading to instances like:
```
msg {
  [aa.bb
] {
key: value
}
}
```

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D43469

llvm-svn: 325513

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/unittests/Format/FormatTestTextProto.cpp b/clang/unittests/Format/FormatTestTextProto.cpp
index 97326cfe0ac..17cde61d2af 100644
--- a/clang/unittests/Format/FormatTestTextProto.cpp
+++ b/clang/unittests/Format/FormatTestTextProto.cpp
@@ -389,6 +389,14 @@ TEST_F(FormatTestTextProto, FormatsExtensions) {
                "    keyyyyyyyyyyyyyy: valuuuuuuuuuuuuuuuuuuuuuuuuue\n"
                "  }\n"
                "}");
+  verifyFormat(
+      "aaaaaaaaaaaaaaa {\n"
+      "  bbbbbb {\n"
+      "    [a.b/cy] {\n"
+      "      eeeeeeeeeeeee: \"The lazy coo cat jumps over the lazy hot dog\"\n"
+      "    }\n"
+      "  }\n"
+      "}");
 }
 
 TEST_F(FormatTestTextProto, NoSpaceAfterPercent) {