Is this Mem Stuma Kosher?
I am currently checking a bunch of Mezuzahs written by the same sofer. He consistently makes the Mem Stuma with a line sticking down on the bottom right.
Here is a picture of one of the more egregious instances.
Is this a shinuy tzurah lifsol? If it is not passul, should I leave it alone or add ink to the bottom to make it square? I would appreciate any insight since I am not finding anything on this in the sefarim I have.