Fix spaces after file/dir names and config directive names in bash completion

Since bash has no concept of completion groups with customizable
behavior, unlike zsh, we tell it to never add trailing spaces and
add the spaces ourselves.

kitty/complete.py

@@ -55,7 +55,7 @@ kitty_completions() {
     fi
 }
 
-complete -F kitty_completions kitty
+complete -o nospace -F kitty_completions kitty
 ''',
 }
 
@@ -106,8 +106,11 @@ def zsh_output_serializer(ans):
 @output_serializer
 def bash_output_serializer(ans):
     lines = []
-    for matches in ans.match_groups.values():
+    for description, matches in ans.match_groups.items():
+        needs_space = description not in ans.no_space_groups
         for word in matches:
+            if needs_space:
+                word += ' '
             lines.append('COMPREPLY+=({})'.format(shlex.quote(word)))
     # debug('\n'.join(lines))
     return '\n'.join(lines)