Fix bug in copying IllegalHeaders.md from build.cmd
Fix bug in copying IllegalHeaders.md from build.cmd

david-mitchell/codeformatter,rollie42/codeformatter,michaelcfanning/codeformatter,Maxwe11/codeformatter,shiftkey/codeformatter,mmitche/codeformatter,rainersigwald/codeformatter,weltkante/codeformatter,BradBarnich/codeformatter,hickford/codeformatter,jeremyabbott/codeformatter,cbjugstad/codeformatter,shiftkey/Octokit.CodeFormatter,dotnet/codeformatter,jaredpar/codeformatter,twsouthwick/codeformatter,srivatsn/codeformatter,dotnet/codeformatter,mmitche/codeformatter,twsouthwick/codeformatter,BertTank/codeformatter,kharaone/codeformatter