Edited Issue: Remove Line Feed from WriteLine method in Shellstream Class [1584]

When working with the expect method, it was discovered the WriteLine was sending an linefeed after a carriage return. This was throwing some SSH implementations off because the linefeed is being interpreted as a second carriage return.

I'm suggesting that:

var commandText = string.Format("{0}{1}", line, "\r\n");

be replaced with

var commandText = string.Format("{0}{1}", line, "\r");