Merge branch 'tr/test-lint-no-export-assignment-in-shell' into maint

* tr/test-lint-no-export-assignment-in-shell:
  test-lint: detect 'export FOO=bar'
  t9902: fix 'test A == B' to use = operator

Author: gitster

t/check-non-portable-shell.pl

@@ -21,6 +21,7 @@ sub err {
 	/^\s*declare\s+/ and err 'arrays/declare not portable';
 	/^\s*[^#]\s*which\s/ and err 'which is not portable (please use type)';
 	/test\s+[^=]*==/ and err '"test a == b" is not portable (please use =)';
+	/^\s*export\s+[^=]*=/ and err '"export FOO=bar" is not portable (please use FOO=bar && export FOO)';
 	# this resets our $. for each file
 	close ARGV if eof;
 }

t/t9902-completion.sh

@@ -69,7 +69,7 @@ run_completion ()
 	local -a COMPREPLY _words
 	local _cword
 	_words=( $1 )
-	test "${1: -1}" == ' ' && _words+=('')
+	test "${1: -1}" = ' ' && _words+=('')
 	(( _cword = ${#_words[@]} - 1 ))
 	__git_wrap__git_main && print_comp
 }