Issue #21942: Fixed source file viewing in pydoc's server mode on Windows.

Lib/pydoc.py

@@ -64,6 +64,7 @@ import re
 import sys
 import time
 import tokenize
+import urllib.parse
 import warnings
 from collections import deque
 from reprlib import Repr
@@ -648,10 +649,7 @@ class HTMLDoc(Doc):
         head = '<big><big><strong>%s</strong></big></big>' % linkedname
         try:
             path = inspect.getabsfile(object)
-            url = path
-            if sys.platform == 'win32':
-                import nturl2path
-                url = nturl2path.pathname2url(path)
+            url = urllib.parse.quote(path)
             filelink = self.filelink(url, path)
         except TypeError:
             filelink = '(built-in)'
@@ -2353,7 +2351,7 @@ def _url_handler(url, content_type="text/html"):
 
     def html_getfile(path):
         """Get and display a source file listing safely."""
-        path = path.replace('%20', ' ')
+        path = urllib.parse.unquote(path)
         with tokenize.open(path) as fp:
             lines = html.escape(fp.read())
         body = '<pre>%s</pre>' % lines