commit 9439a9901031adbd5c05fec5a5f692144bb3fd53
from: Christian Weisgerber <naddy@mips.inka.de>
date: Wed Sep 16 20:37:41 2020 UTC

replace ksh syntax with POSIX arithmetic expressions
ok kn stsp

commit - 72862ecf9ce7f62a2cc15524538f6f6619c83bf7
commit + 9439a9901031adbd5c05fec5a5f692144bb3fd53
blob - e95df3908f366957e8608730cd2dc49e62155ac0
blob + aa03589cae17845657ef3efe99e9b11b314d2dca
--- regress/cmdline/common.sh
+++ regress/cmdline/common.sh
@@ -96,13 +96,13 @@ git_show_tree()
 
 trim_obj_id()
 {
-	let trimcount=$1
-	id=$2
+	local trimcount=$1
+	local id=$2
 
-	pat=""
-	while [ trimcount -gt 0 ]; do
+	local pat=""
+	while [ "$trimcount" -gt 0 ]; do
 		pat="[0-9a-f]$pat"
-		let trimcount--
+		trimcount=$((trimcount - 1))
 	done
 
 	echo ${id%$pat}