Merge branch 'maint'

* maint:
git-submodule.sh: separate parens by a space to avoid confusing some shells
Documentation/technical/api-diff.txt: correct name of diff_unmerge()
read_gitfile_gently: use ssize_t to hold read result
remove tests of always-false condition
rerere.c: diagnose a corrupt MERGE_RR when hitting EOF between TAB and '\0'

diff --cc git-submodule.sh
Simple merge

diff --cc rerere.c
Simple merge

diff --cc setup.c
Simple merge

diff --cc transport.c
Simple merge