[bugfix]: unquote title for red-links in Index"

When getting titles from Index page HTML code, characters
can be url-encoded (e.g. when an "'" is present in the title page).

Unquote to obtain the correct page title.

Change-Id: If1d6dfc0e411796df3d2b8ae1c673f76d99911ce
---
M pywikibot/proofreadpage.py
1 file changed, 16 insertions(+), 0 deletions(-)

diff --git a/pywikibot/proofreadpage.py b/pywikibot/proofreadpage.py
index 35ff2dd..56181aa 100644
--- a/pywikibot/proofreadpage.py
+++ b/pywikibot/proofreadpage.py
@@ -32,6 +32,7 @@
 from functools import partial
 from http import HTTPStatus
 from typing import Any, Optional, Union
+from urllib.parse import unquote
 
 from requests.exceptions import ReadTimeout
 
@@ -974,6 +975,7 @@
                 title = self._parse_redlink(href)  # non-existing page
                 if title is None:  # title not conforming to required format
                     continue
+                title = unquote(title)
             else:
                 title = a_tag.get('title')   # existing page
 

