Fix test suite

[vlcinsky]

Trying to run test suite, some cases were failing.

PR is fixing these cases:

• detection of hg/git caused failure if some was missing
• trailing space in logs were removed by editor and caused failing case. Test modified to make the significant trailing space clearly visible and prone to removal by an editor.

[ekohl]

Apologies for not responding earlier. At first glance this looks good and a neat cleanup but Appveyor is still unhappy. Have you had a look at it?

[vlcinsky]

Reading logs form appveyor it looks, like following problems are present:

• console encoding: if console does not use utf-8, it might have problems to encode output of some chars to console and fails with that nasty encode problem error.
• problem to open a file: Windows typically locks the file used and other processes might have problems to access it. It reminds me the situation, when my "windows based" college cannot delete a file because it is already open in editor.
• attempt to write a stream to closed file: no idea what is going on.

As I do not have access to MS Windows, I am unable to investigate this easily.

Can some MS Windows user investigate the problems? I guess running $ tox would serve the purpose (of course with proper investigation of what is going on).

[ekohl]

There is a universal_newlines=True in `subprocess that I think handles the encoding as well. Perhaps that would clean up the code enough?

[ekohl]

I forgot this was still open and created #27 as well. Given the Windows issues, should we even try to support it?

[jeremycarroll]

I fixed the appveyor tests. They all seemed genuine bugs, and the fixes were in the code not the tests

[ekohl]

Closing in favor of the other PR