[clang] [libclang/python] Add type annotations to the TranslationUnit class (PR #180876)

[Jannick Kremer via cfe-commits]

================
@@ -3490,11 +3504,12 @@ def from_source(
         etc. e.g. ["-Wall", "-I/path/to/include"].
 
         In-memory file content can be provided via unsaved_files. This is a
-        list of 2-tuples. The first element is the filename (str or
+        list of 2-tuples. The first element is the filename (str, bytes or
         PathLike). The second element defines the content. Content can be
-        provided as str source code or as file objects (anything with a read()
-        method). If a file object is being used, content will be read until EOF
-        and the read cursor will not be reset to its original position.
+        provided as str or bytes source code, or as file objects (anything with
+        a read() method). If a file object is being used, content will be read
+        until EOF and the read cursor will not be reset to its original
+        position.
----------------
DeinAlptraum wrote:

How exactly do you mean "everywhere"?
We could generally always pass string arguments through `b()`. That would affect quite a few places, but it would be trivial to do. 

https://github.com/llvm/llvm-project/pull/180876