Add missing comma to tuple

Currently, Python implicitly concatenates two string entries located next to
each other because there is no comma separating them.  The code concatenates
"*.pyc" and "sass/*.scss", creating a single entry called "*.pycsass/*.scss".

cms/envs/common.py

@@ -543,7 +543,7 @@ PIPELINE_JS_COMPRESSOR = None
 
 STATICFILES_IGNORE_PATTERNS = (
     "*.py",
-    "*.pyc"
+    "*.pyc",
     # it would be nice if we could do, for example, "**/*.scss",
     # but these strings get passed down to the `fnmatch` module,
     # which doesn't support that. :(