Reported by shellcheck.

	* runtest: Use $((..)) not `expr ..`.

2 files changed, 6 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index 1059d8c..ffc0586 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2016-04-17  Ben Elliston  <bje@gnu.org>
 
+	Reported by shellcheck.
+	* runtest: Use $((..)) not `expr ..`.
+
+2016-04-17  Ben Elliston  <bje@gnu.org>
+
 	* configure.ac (AC_INIT): Update version number.
 	* configure: Regenerate.
 	* runtest.exp (frame_version): Update version number.
diff --git a/runtest b/runtest
index 692182f..15fbea2 100755
--- a/runtest
+++ b/runtest
@@ -87,7 +87,7 @@ verbose=0
 debug=""
 for a in "$@" ; do
   case $a in
-      -v|--v|-verb*|--verb*)    verbose=`expr $verbose + 1`;;
+      -v|--v|-verb*|--verb*)    verbose=$((verbose + 1)) ;;
       -D0|--D0)       debug="-D 0" ;;
       -D1|--D1)       debug="-D 1" ;;
   esac