feat(bash-completion): prevent space after profile completion .

When tab completing a profile, an unwanted space is added after the
period `.`, necessitating hitting backspace before further completions
can be accessed.

The implementation here was based on the following resources:

* https://stackoverflow.com/a/66151065
  - Add spaces to the end of some Bash autocomplete options,
    but not to others?
* https://stackoverflow.com/a/19271994
  - How can I check the last character in a string in bash?

An alternative to checking for the last character is using regex:

* https://stackoverflow.com/a/21425089
  - How to check if the last string character equals '*' in Bash?

contrib/completion/bash-completion.sh

@@ -61,10 +61,15 @@ function _resticprofile() {
       ;;
     esac
   fi
+
+  if [[ ! "${COMPREPLY[@]}" == *. ]]; then
+    # Add space if the last character is not a '.'
+    compopt +o nospace
+  fi
 }
 
 # Registering the completion
-complete -F _resticprofile resticprofile
+complete -F _resticprofile -o nospace resticprofile
 
 #
 # __resticprofile_get_other_completions