fix(fish completions): quote short options too

this should make things a bit easier for any programs that want to
make '-?' an alias for '--help'

clap_complete/src/shells/fish.rs

@@ -116,7 +116,7 @@ fn gen_fish_inner(
 
         if let Some(shorts) = flag.get_short_and_visible_aliases() {
             for short in shorts {
-                template.push_str(format!(" -s {short}").as_str());
+                template.push_str(format!(" -s '{short}'").as_str());
             }
         }