--ignore-dot does not ignore .rgignore

[BurntSushi]

Discussed in https://github.com/BurntSushi/ripgrep/discussions/2197

^{Originally posted by balazser April 29, 2022} Why --ignore-dot switch ignores .ignore but not .rgignore? Although if .rgignore file presents in the parent dictionary it can be ignored with --ignore-parent.

Here is a test case:

$ mkcd /tmp/rg-2197
$ touch a b c
$ echo a > .ignore
$ echo b > .rgignore
$ rg --files
c
$ rg --files --no-ignore-dot
c
a