Vim Mappings Verbose

I have a Vim normal mode mapping, and I don’t know where it comes from. My Vim config, a plugin, somewhere else? nmap shows me the mapping:

:nmap gsp
n  gsp         * 1z=

And verbose nmap shows me where it comes from:

:verbose nmap gsp
n  gsp         * 1z=
        Last set from ~/.vimrc line 111

The setting is coming from inside the .vimrc!