Double-quote a bash variable to prevent globbing and word splitting

The newer version of shell-lint that we are using is now warning about
this.

bash/.bash_greeter

@@ -69,7 +69,7 @@ __print_centered_multiline() {
   local offset=$2
   while IFS= read -r line; do
     # Store length
-    if [ ${#line} -gt $strlen ]; then
+    if [ ${#line} -gt "$strlen" ]; then
       strlen="${#line}"
     fi
   done <<< "$1"