[clang-tools-extra] [llvm] [clang-doc] Adds a mustache backend (PR #133161)

[Paul Kirth via llvm-commits]

================
@@ -0,0 +1,26 @@
+//===-- FileHelpersClangDoc.h --- File Helpers -------------------*- C++-*-===//
----------------
ilovepi wrote:

probably putting this in `clang-doc/support/File.h` is a bit more typical. At the least the file shouldn't have helper in the name, and probably doesn't need ClangDoc in it either.

https://github.com/llvm/llvm-project/pull/133161