Fix typo.

Thanks to Alp Toker for noticing.

llvm-svn: 210744
diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index d8633d8..6b57b18 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -258,12 +258,12 @@
 namespace clang {
 namespace format {
 
-const std::error_category &getParestCategory() {
+const std::error_category &getParseCategory() {
   static ParseErrorCategory C;
   return C;
 }
 std::error_code make_error_code(ParseError e) {
-  return std::error_code(static_cast<int>(e), getParestCategory());
+  return std::error_code(static_cast<int>(e), getParseCategory());
 }
 
 const char *ParseErrorCategory::name() const LLVM_NOEXCEPT {