Merge branch 'jn/grep-open' into next

* jn/grep-open:
  t/t7811-grep-open.sh: remove broken/redundant creation of fake "less" script
  t/t7811-grep-open.sh: ensure fake "less" is made executable
  t/lib-pager.sh: remove unnecessary '^' from 'expr' regular expression

t/lib-pager.sh

@@ -9,7 +9,7 @@ test_expect_success 'determine default pager' '
 	test -n "$less"
 '
 
-if expr "$less" : '^[a-z][a-z]*$' >/dev/null
+if expr "$less" : '[a-z][a-z]*$' >/dev/null
 then
 	test_set_prereq SIMPLEPAGER
 fi

t/t7811-grep-open.sh

@@ -84,10 +84,11 @@ test_expect_success 'git grep -O --no-index' '
 '
 
 test_expect_success 'setup: fake "less"' '
-	cat >less <<-\EOF
+	cat >less <<-\EOF &&
 	#!/bin/sh
 	printf "%s\n" "$@" >actual
 	EOF
+	chmod +x less
 '
 
 test_expect_success 'git grep -O jumps to line in less' '
@@ -108,11 +109,6 @@ test_expect_success 'git grep -O jumps to line in less' '
 
 test_expect_success 'modified file' '
 	rm -f actual &&
-	cat >less <<-\EOF &&
-	#!/bin/sh
-	printf "%s\n" "$@" >actual
-	EOF
-	chmod +x $less &&
 	cat >expect <<-\EOF &&
 	+/*enum grep_pat_token
 	grep.h