Bug: \r\n not removed for last argument

**Issue by [Stretto](https://github.com/Stretto)**
_Saturday Jun 17, 2017 at 09:54 GMT_
_Originally opened as https://github.com/gsscoder/commandline/issues/453_

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I have an app that works fine when ran from the console but fails in visual studio. Seems the last 2 characters a single command, like "app --late" is "--late\r\n" which breaks the parser.

Adding

for(var i = 0; i < args.Length; i++)
args[i] = args[i].Trim('\n','\r');

allows it to work.

The issue names no repository files or tests. Start by tracing how command-line arguments are received and parsed, focusing on the final argument; reproduce the reported case where it includes \r\n and compare it with the provided trimming workaround. Done means the final argument is parsed without trailing carriage-return or newline characters and the behavior is covered by a regression test.

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