diff --git a/docs/conf.py b/docs/conf.py
index 9fe9d985..99fe52aa 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,3 +1,5 @@
+import packaging
+
 from pallets_sphinx_themes import get_version
 from pallets_sphinx_themes import ProjectLink
 
@@ -74,7 +76,7 @@ def github_link(name, rawtext, text, lineno, inliner, options=None, content=None
     else:
         words = None
 
-    if release.endswith("dev"):
+    if packaging.version.parse(release).is_devrelease:
         url = "{0}master/{1}".format(base_url, text)
     else:
         url = "{0}{1}/{2}".format(base_url, release, text)
diff --git a/docs/patterns/urlprocessors.rst b/docs/patterns/urlprocessors.rst
index 3f65d758..0d743205 100644
--- a/docs/patterns/urlprocessors.rst
+++ b/docs/patterns/urlprocessors.rst
@@ -39,8 +39,8 @@ generate URLs from one function to another you would have to still provide
 the language code explicitly which can be annoying.
 
 For the latter, this is where :func:`~flask.Flask.url_defaults` functions
-come in.  They can automatically inject values into a call for
-:func:`~flask.url_for` automatically.  The code below checks if the
+come in.  They can automatically inject values into a call to
+:func:`~flask.url_for`.  The code below checks if the
 language code is not yet in the dictionary of URL values and if the
 endpoint wants a value named ``'lang_code'``::