diff -r 48943533965e Lib/pydoc.py
--- a/Lib/pydoc.py	Sun Sep 27 22:38:33 2015 +0300
+++ b/Lib/pydoc.py	Sun Sep 27 22:53:49 2015 +0300
@@ -59,6 +59,7 @@ import importlib.util
 import inspect
 import io
 import os
+import pathlib
 import pkgutil
 import platform
 import re
@@ -660,7 +661,7 @@ class HTMLDoc(Doc):
         head = '<big><big><strong>%s</strong></big></big>' % linkedname
         try:
             path = inspect.getabsfile(object)
-            url = urllib.parse.quote(path)
+            url = pathlib.Path(path).as_uri()[5:]
             filelink = self.filelink(url, path)
         except TypeError:
             filelink = '(built-in)'
diff -r 48943533965e Lib/test/test_pydoc.py
--- a/Lib/test/test_pydoc.py	Sun Sep 27 22:38:33 2015 +0300
+++ b/Lib/test/test_pydoc.py	Sun Sep 27 22:53:49 2015 +0300
@@ -7,9 +7,11 @@ import inspect
 import pydoc
 import py_compile
 import keyword
+import pathlib
 import _pickle
 import pkgutil
 import re
+import shutil
 import stat
 import string
 import test.support
@@ -23,9 +25,9 @@ from io import StringIO
 from collections import namedtuple
 from test.support.script_helper import assert_python_ok
 from test.support import (
-    TESTFN, rmtree,
+    TESTFN, TESTFN_UNDECODABLE, TESTFN_UNENCODABLE, rmtree,
     reap_children, reap_threads, captured_output, captured_stdout,
-    captured_stderr, unlink, requires_docstrings
+    captured_stderr, unlink, requires_docstrings, temp_dir, swap_item
 )
 from test import pydoc_mod
 
@@ -137,7 +139,7 @@ expected_html_pattern = """
 <td valign=bottom>&nbsp;<br>
 <font color="#ffffff" face="helvetica, arial">&nbsp;<br><big><big><strong><a href="test.html"><font color="#ffffff">test</font></a>.pydoc_mod</strong></big></big> (version 1.2.3.4)</font></td
 ><td align=right valign=bottom
-><font color="#ffffff" face="helvetica, arial"><a href=".">index</a><br><a href="file:%s">%s</a>%s</font></td></tr></table>
+><font color="#ffffff" face="helvetica, arial"><a href=".">index</a><br><a href="%s">%s</a>%s</font></td></tr></table>
     <p><tt>This&nbsp;is&nbsp;a&nbsp;test&nbsp;module&nbsp;for&nbsp;test_pydoc</tt></p>
 <p>
 <table width="100%%" cellspacing=0 cellpadding=2 border=0 summary="section">
@@ -347,7 +349,7 @@ def get_pydoc_html(module):
     "Returns pydoc generated output as html"
     doc = pydoc.HTMLDoc()
     output = doc.docmodule(module)
-    loc = doc.getdocloc(pydoc_mod) or ""
+    loc = doc.getdocloc(module) or ""
     if loc:
         loc = "<br><a href=\"" + loc + "\">Module Docs</a>"
     return output.strip(), loc
@@ -355,7 +357,7 @@ def get_pydoc_html(module):
 def get_pydoc_text(module):
     "Returns pydoc generated output as text"
     doc = pydoc.TextDoc()
-    loc = doc.getdocloc(pydoc_mod) or ""
+    loc = doc.getdocloc(module) or ""
     if loc:
         loc = "\nMODULE DOCS\n    " + loc + "\n"
 
@@ -407,12 +409,61 @@ class PydocDocTest(unittest.TestCase):
     def test_html_doc(self):
         result, doc_loc = get_pydoc_html(pydoc_mod)
         mod_file = inspect.getabsfile(pydoc_mod)
-        mod_url = urllib.parse.quote(mod_file)
+        mod_url = pathlib.Path(mod_file).as_uri()
         expected_html = expected_html_pattern % (
                         (mod_url, mod_file, doc_loc) +
                         expected_html_data_docstrings)
         self.assertEqual(result, expected_html)
 
+    def load_mod(self, name, path):
+        loader = importlib._bootstrap_external.SourceFileLoader(name, path)
+        spec = importlib.util.spec_from_file_location(name, path, loader=loader)
+        return importlib._bootstrap._load(spec)
+
+    @unittest.skipUnless(TESTFN_UNDECODABLE,
+                     "needed undecodable filename")
+    @unittest.skipIf(sys.flags.optimize >= 2,
+                     "Docstrings are omitted with -O2 and above")
+    @unittest.skipIf(hasattr(sys, 'gettrace') and sys.gettrace(),
+                     'trace function introduces __locals__ unexpectedly')
+    @requires_docstrings
+    def test_html_doc_undecodable_path(self):
+        with swap_item(sys.modules, pydoc_mod.__name__, None), \
+             temp_dir(TESTFN_UNDECODABLE):
+            path = os.path.join(TESTFN_UNDECODABLE, b'pydoc_mod.py')
+            shutil.copyfile(pydoc_mod.__file__, path)
+            path = os.path.abspath(os.fsdecode(path))
+            mod = self.load_mod(pydoc_mod.__name__, path)
+            result, doc_loc = get_pydoc_html(mod)
+            mod_file = inspect.getabsfile(mod)
+            mod_url = pathlib.Path(mod_file).as_uri()
+            expected_html = expected_html_pattern % (
+                            (mod_url, mod_file, doc_loc) +
+                            expected_html_data_docstrings)
+            self.assertEqual(result, expected_html)
+
+    @unittest.skipUnless(TESTFN_UNENCODABLE,
+                     "needed unencodable filename")
+    @unittest.skipIf(sys.flags.optimize >= 2,
+                     "Docstrings are omitted with -O2 and above")
+    @unittest.skipIf(hasattr(sys, 'gettrace') and sys.gettrace(),
+                     'trace function introduces __locals__ unexpectedly')
+    @requires_docstrings
+    def test_html_doc_unencodable_path(self):
+        with swap_item(sys.modules, pydoc_mod.__name__, None), \
+             temp_dir(TESTFN_UNENCODABLE):
+            path = os.path.join(TESTFN_UNENCODABLE, 'pydoc_mod.py')
+            shutil.copyfile(pydoc_mod.__file__, path)
+            path = os.path.abspath(path)
+            mod = self.load_mod(pydoc_mod.__name__, path)
+            result, doc_loc = get_pydoc_html(mod)
+            mod_file = inspect.getabsfile(mod)
+            mod_url = pathlib.Path(mod_file).as_uri()
+            expected_html = expected_html_pattern % (
+                            (mod_url, mod_file, doc_loc) +
+                            expected_html_data_docstrings)
+            self.assertEqual(result, expected_html)
+
     @unittest.skipIf(sys.flags.optimize >= 2,
                      "Docstrings are omitted with -O2 and above")
     @unittest.skipIf(hasattr(sys, 'gettrace') and sys.gettrace(),