style: remove trailing whitespace (#12303)

plugins/screen/screen.plugin.zsh

@@ -8,7 +8,7 @@ if [[ "$TERM" == screen* ]]; then
     _GET_HOST='echo $HOST | sed "s/\..*//"'
   fi
 
-  # use the current user as the prefix of the current tab title 
+  # use the current user as the prefix of the current tab title
   TAB_TITLE_PREFIX='"`'$_GET_HOST'`:`'$_GET_PATH' | sed "s:..*/::"`$PROMPT_CHAR"'
   # when at the shell prompt, show a truncated version of the current path (with
   # standard ~ replacement) as the rest of the title.