50f9c1c09c
As pointed out in a comment on T89421, if a MTL file contained something like: `map_Ka -o 1 2.png` then it was parsed as having offset `1 2` and the texture filename just a `.png`. Make it so that mtl option numbers are parsed in a way where the number is only accepted only if it's followed by whitespace. Differential Revision: https://developer.blender.org/D15385