[clang-format][NFC] Add .clang-format to clang/tools/clang-format/

And reformat ClangFormat.cpp in the directory.

Author: owenca

clang/tools/clang-format/.clang-format

@@ -0,0 +1,4 @@
+BasedOnStyle: LLVM
+InsertBraces: true
+LineEnding: LF
+RemoveBracesLLVM: true

clang/tools/clang-format/ClangFormat.cpp

@@ -128,8 +128,7 @@ static cl::opt<std::string> QualifierAlignment(
 static cl::opt<std::string> Files(
     "files",
     cl::desc("A file containing a list of files to process, one per line."),
-    cl::value_desc("filename"),
-    cl::init(""), cl::cat(ClangFormatCategory));
+    cl::value_desc("filename"), cl::init(""), cl::cat(ClangFormatCategory));
 
 static cl::opt<bool>
     Verbose("verbose", cl::desc("If set, shows the list of processed files"),