[clang] [libclang/python] Expose Rewriter to the python binding (PR #77269)

[Vlad Serebrennikov via cfe-commits]

Endilll wrote:

@linux4life798 Nice catch! I see that so far only `CompilationDatabase` and `CompletionChunk` expose functions in camelCase. It would be nice to change them, too, but those are decade-old APIs that _I think_ we promise stability for, so it might not be possible.

https://github.com/llvm/llvm-project/pull/77269