Apply suggestions from code review

Co-authored-by: neonene <53406459+neonene@users.noreply.github.com>

Author: encukou

Lib/ctypes/__init__.py

@@ -342,6 +342,7 @@ class c_wchar(_SimpleCData):
     _type_ = "u"
 
 def _reset_cache():
+    _pointer_type_cache_fallback.clear()
     _c_functype_cache.clear()
     if _os.name == "nt":
         _win_functype_cache.clear()

Lib/test/test_ctypes/test_incomplete.py

@@ -3,7 +3,7 @@
 import warnings
 from ctypes import Structure, POINTER, pointer, c_char_p
 
-# String-based "incomplete pointers" wers implemented ctypes 0.6.3 (2003, when
+# String-based "incomplete pointers" were implemented in ctypes 0.6.3 (2003, when
 # ctypes was an external project). They made obsolete by the current
 # incomplete *types* (setting `_fields_` late) in 0.9.5 (2005).
 # ctypes was added to Python 2.5 (2006), without any mention in docs.