first steps: don't show help output for dunders we've grabbed from builtins

Author: adqm

Lib/pydoc.py

@@ -1706,6 +1706,11 @@ def describe(thing):
 
 def locate(path, forceload=0):
     """Locate an object by name or dotted path, importing as necessary."""
+    if re.match(r"^__\w+__$", path):
+        # if we're looking up a special variable, don't grab the result from
+        # the builtins module, because it's probably not what the user wanted
+        # (if it is, they can look up builtins.whatever)
+        return None
     parts = [part for part in path.split('.') if part]
     module, n = None, 0
     while n < len(parts):