typing: constrain argument/return types of encoding.toutf8b()

mercurial/encoding.py

@@ -560,7 +560,7 b' else:'
 
 
 def getutf8char(s, pos):
-    # type: (Any, Any) -> Any
+    # type: (bytes, int) -> bytes
     '''get the next full utf-8 character in the given string, starting at pos
 
     Raises a UnicodeError if the given location does not start a valid
@@ -579,7 +579,7 b' def getutf8char(s, pos):'
 
 
 def toutf8b(s):
-    # type: (Any) -> Any
+    # type: (bytes) -> bytes
     '''convert a local, possibly-binary string into UTF-8b
 
     This is intended as a generic method to preserve data when working