Fix spacing after comment hash.

pkg_resources/__init__.py

@@ -2976,7 +2976,7 @@ def _initialize_master_working_set():
     # ensure that all distributions added to the working set in the future
     # (e.g. by calling ``require()``) will get activated as well,
     # with higher priority (replace=True).
-    dist = None # ensure dist is defined for del dist below
+    dist = None  # ensure dist is defined for del dist below
     for dist in working_set:
         dist.activate(replace=False)
     del dist