Paragraph example can not run under msys2 environment

I build my windows code on [msys2](http://www.msys2.org/).

I found this sample can not run on the msys bash console.
https://github.com/gizak/termui/blob/master/_example/par.go

But, If I use "go build" to generate exe file, it could work under CMD.exe enviornment.

Start with _example/par.go and reproduce the failure in an MSYS2 bash console, then compare it with the reported successful run under CMD.exe. Identify the runtime difference that prevents the example from starting and verify that the example runs correctly in the MSYS2 environment when done.

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