crucible.py script adds fake differences regarding line feeds when linking to git repo

When creating a review using the crucible.py script from command line and linking to a GIT repo, the added patch includes fake differences about removed line feeds which were not part of the original diff.
If the script is called without linking to a git repo, then the patch is correctly uploaded.

Example 1: not link to any repo

git format-patch -1 -N --stdout | crucible.py -m "title" PROJ @reviewer

Patch is correctly uploaded:

Example 2: link to a GIT repo

git format-patch -1 -N --stdout | crucible.py -m "title" -r repo PROJ @reviewer

Patch is uploaded with a fake difference as if a line feed was removed: