Weird errors when running the fish built-in `functions` with this plugin installed

[poscat0x04]

Describe the bug
Running the command functions -D <function name> or functions --details <function name> outputs an error

functions: -D: unknown option

After the normal output of the functions command.

To Reproduce
(Assuming a clean fish install)

1. Install fisher
2. Install this plugin using fisher
3. Run functions -D fish_title and observe the output

Expected behavior
This should not happen

System (please complete the following information):

• fish, version 3.7.1
• abbr tips installed using fisher