git-sh-i18n--envsubst: add SYNOPSIS section to the documentation
Change the documentation for the git-sh-i18n--envsubst program to
include a SYNOPSIS section. Include the invocation of the program from
git-sh-i18n.sh.
Not having a SYNOPSIS section caused the "doc" target to fail on
Centos 5.5 with asciidoc 8.2.5, while building with 8.6.4 on Debian
works just fine.
The relevant error was:
ERROR: git-sh-i18n--envsubst.txt: line 9: second section must be named SYNOPSIS
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>