Changed the Line Endings git config option so it works on Windows

[catherinef37]

Our group noticed at a recent workshop that in Git bash for Windows, setting git config --global core.autocrlf false would prevent the error messages about line endings (i.e. warning: LF will be replaced by CRLF in hello.txt. The file will have its original line endings in your working directory). Currently the instructions have this option set to true, which does not do what we want.