version/version.sh: strip wc whitespace on macos
The output of `wc -l` on darwin starts with a tab:
git rev-list 266f6548611ad0de93e7470eb13731db819f184b..HEAD | wc -l
0
@@ -33,7 +33,7 @@ case $# in
# that git displays the full commit hash.
git_hash=$(git describe --always --dirty --exclude '*' --abbrev=200)
# The number of extra commits between the release base to git_hash.
- change_count=$(git rev-list ${base_git_hash}..HEAD | wc -l)
+ change_count=$(git rev-list ${base_git_hash}..HEAD | wc -l | sed 's/ *//')
;;
6)
# Test mode: rather than run git commands and whatnot, take in
