On converting regex, escape special character that is literal but special when escaped in Vim regex

[Konfekt]

If g:grepper.searchreg is set and grepper-tools-keys.escape contains a character which in a magic Vim regex is literal but special when escaped, for example {, then escape this character when changing to a Vim regexp (as documented by :help g:grepper.searchreg).

PS: As the submitted issues tell, I am an avid user of this helpful plug-in, thank you!