Better heuristic for checking if a file is a sha.
Better heuristic for checking if a file is a sha.

We happen to have a couple of files in our codebase that are of
length 41. This heuristic makes it far less likely to misdetect
such files as shas. It's still not foolproof though.

techlabxe/git-media,BibleUs/git-media,alebedev/git-media,vitei/git-media,TWOEARS/git-media