Do not normalize URL fragments

Fixes #1655

docs/about/release-notes.md

@@ -54,6 +54,10 @@ your global navigation uses more than one level, things will likely be broken.
 [Bootswatch 4.1]: https://getbootstrap.com/docs/4.1/getting-started/introduction/
 [dropdowns]: https://getbootstrap.com/docs/4.1/components/navs/#pills-with-dropdowns
 
+### Other Changes and Additions to Version 1.1
+
+* Bugfix: Do not normalize URL fragments (#1655).
+
 ## Version 1.0.4 (2018-09-07)
 
 * Bugfix: Ignore absolute links in Markdown (#1621).

mkdocs/tests/utils/utils_tests.py

@@ -104,6 +104,11 @@ class UtilsTests(unittest.TestCase):
                 'style.css?v=20180308c',
                 'style.css?v=20180308c',
                 '../style.css?v=20180308c'
+            ],
+            '#some_id': [
+                '#some_id',
+                '#some_id',
+                '#some_id'
             ]
         }
 
@@ -160,6 +165,11 @@ class UtilsTests(unittest.TestCase):
                 'style.css?v=20180308c',
                 '../style.css?v=20180308c',
                 '../../style.css?v=20180308c'
+            ],
+            '#some_id': [
+                '#some_id',
+                '#some_id',
+                '#some_id'
             ]
         }
 

mkdocs/utils/__init__.py

@@ -243,7 +243,7 @@ def normalize_url(path, page=None, base=''):
     path = path_to_url(path or '.')
     # Allow links to be fully qualified URL's
     parsed = urlparse(path)
-    if parsed.scheme or parsed.netloc or path.startswith('/'):
+    if parsed.scheme or parsed.netloc or path.startswith(('/', '#')):
         return path
 
     # We must be looking at a local path.