Confused: Binding <C-m> in normal mode gets called by location list entry populated ALE

[tmzhuang]

I use the location list that ALE populates quite frequently to jump to linting warnings/errors. I use :lop to open the location list and select an entry, then press Enter to jump to that warning in my file. Recently I bound to a command from another plugin:
nnoremap <C-m> :Buffers<CR>
To my surprise, pressing Enter on an entry in the location list now calls Buffers. I tried to bind C-m to something else:
nnoremap <C-m> :h map<CR>
In this case, pressing Enter on a location list entry opens up the vim map help page.

Not too sure what I'm doing wrong here as I don't see any other bindings for C-m nor do I see any mention of it in the docs.

[tmzhuang]

Ah I think I found the issue:
|i_CTRL-M| CTRL-M same as <CR>
Didn't realize this was the case. Found this with :h index. I'll try another key combination.