Fix slugification for uppercase letters in the slug.

Author: gregmuellegger

readthedocs/builds/version_slug.py

@@ -64,6 +64,7 @@ def slugify(self, content):
         if not content:
             return ''
         slugified = ''
+        content = content.lower()
         for char in content:
             if char not in self.allowed_chars:
                 slugified += self.placeholder

readthedocs/rtd_tests/tests/test_version_slug.py

@@ -29,6 +29,12 @@ def test_normalizing_slashes(self):
             project=self.pip)
         self.assertEqual(version.slug, 'releases-1.0')
 
+    def test_uppercase(self):
+        version = Version.objects.create(
+            verbose_name='SomeString-charclass',
+            project=self.pip)
+        self.assertEqual(version.slug, 'somestring-charclass')
+
     def test_uniqueness(self):
         version = Version.objects.create(
             verbose_name='1!0',