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Re:3-character filename extensions by lucb1e on Monday July 14, 2014 @10:17PM (#8034378)
That is the most annoying error ever. No, I must not! I shall decide for myself what I must and mustn't do! /me opens cmd.exe and uses ren untitled.txt .gitignore

A slightly bigger challenge is a file named CON :)

Re:3-character filename extensions by nik41tkins on Monday July 14, 2014 @11:24PM (#8034601)
Or .... , but that one is fairly easy as long as you COPY from the CONsole to a <fileName>. And remember ^Z to save and quit.