Any one character after a backslash should be removed

[oskarlh]

Half-Life simply removes any character after a backslash (unless it's \n which becomes a newline), so \x becomes \, \! becomes \ etc. Take this map for example: https://twhl.info/vault/view/2285 It contains

{
"origin" "-546 423 -402"
"framerate" "10"
"angles" "0 0 0"
"targetname" "skeleton1"
"model" "models\!uplant3.mdl"
"rendercolor" "0 0 0"
"classname" "cycler_sprite"
}

but models/uplant3.mdl (no exclamation mark) gets loaded by Half-Life. Resgen on the other hand, includes "models/!uplant3.mdl", even though uplant3.mdl is a model that comes with Half-Life.

I believe this is the code that's responsible https://github.com/id-Software/Quake/blob/bf4ac424ce754894ac8f1dae6a3981954bc9852d/WinQuake/pr_edict.c#L693-L717