vim map q to 0 in the .vimrc has unexpected behaviour

Question

I am attempting to remap my 0 key to q to quickly return to the beginning of the current line in my .vimrc file.

I have: map q 0

Expected Behavior: Upon pressing q in normal mode the cursor should move to the zeroth column position on the current line.

Current Behavior: Upon pressing q in normal mode the cursor moves the the 1st column on the current line.

Not sure what the reason is for this behavior. Thanks in advance :)

Versions: VIM - Vi IMproved: 8.1, Iterm2: Build 3.3.7, MacOS: 10.13.4

Answer 1

There was a trailing space on the command in my .vimrc file. Thanks for your help everyone. I hadn't realized a trailing space would be picked up like that. Good to know for future reference.