Do not re-raise the exception if the one that we are checking

Author: humitos

readthedocs/core/utils/__init__.py

@@ -222,9 +222,8 @@ def safe_makedirs(directory_name):
     try:
         os.makedirs(directory_name)
     except OSError as e:
-        if e.errno == errno.EEXIST:
-            pass
-        raise
+        if e.errno != errno.EEXIST:  # 17, FileExistsError
+            raise
 
 
 def safe_unlink(path):