Removing a bashism from git-effort

bin/git-effort

@@ -73,8 +73,9 @@ effort() {
     len=${#file}
     dot="."
     f_dot=$file
-    for ((i=0; i < 45-$len ;i++)); do
+    i=0 ; while test $i -lt 45-$len ; do
        f_dot=$f_dot$dot
+       i=$(($i+1))
     done
 
     printf "  \033[${color}m%s %-10d" $f_dot $commits
@@ -129,4 +130,4 @@ heading
 effort $files | tee $tmp && sort_effort
 echo
 
-show_cursor
+show_cursor