Weird parsing error at the beginning of some FAF files

[ChessBerry]

Opening ../FAForever_GitHub/units\XSL0301\XSL0301_script.lua
line 1:0 token recognition error at: 'ï'
line 1:1 token recognition error at: '»'
line 1:2 token recognition error at: '¿'

and
Opening ../FAForever_GitHub/units/UAL0301/UAL0301_script.lua
line 1:0 token recognition error at: 'ï'
line 1:1 token recognition error at: '»'
line 1:2 token recognition error at: '¿'

Doesn't seem to effect anything, still weird though. Might be the BOM as that is a usually hidden string of three characters at the beginning of files? No clue.