[bugfix] Fix Python 2 Unicode error in page.py

Bug: T222623
Change-Id: Ida6af7b8971626d77a3b8aac3291b737c882bf4b
---
M pywikibot/page.py
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pywikibot/page.py b/pywikibot/page.py
index ec0adc2..582300c 100644
--- a/pywikibot/page.py
+++ b/pywikibot/page.py
@@ -370,7 +370,7 @@
             title = title.replace(' ', '_')
         if as_url:
             encoded_title = title.encode(self.site.encoding())
-            title = quote_from_bytes(encoded_title, safe='')
+            title = quote_from_bytes(encoded_title, safe=str(''))
         if as_filename:
             # Replace characters that are not possible in file names on some
             # systems.

