Coala: doctest polluting tests with TrumpScript alias ts

[jayvdb]

Similar to https://github.com/coala/coala/issues/5518 , TrumpScript's alias 'ts' is causing problems with https://github.com/coala/coala/pull/5540

[jayvdb]

We should also see if this problem is fixed in a more recent version of pytest. (The incompatible pytest plugins will need to be disabled to test using the latest version of pytest)

[jayvdb]

This is blocking a newcomer, so fairly important.

[jayvdb]

Still a problem with current release of pytest 3.6.1

https://travis-ci.org/jayvdb/coala/jobs/393916581#L647

https://travis-ci.org/jayvdb/coala/jobs/393916581#L849

[pareksha]

Ah, I see, Trumpscript and TypeScript have the same alias 'ts,', that is why they both are colliding. Even Language['ts'] in the doctests gives TypeScript as output instead of TrumpScript.

There are two potential solutions for this-

1. Changing the alias name of TrumpSript in the doctests.
2. Creating a private method above the main doctest and changing the Typescript alias name and changing it back to 'ts,' in another private method after the main doctest.

[jayvdb]

Probably best to give it a different alias, which isnt likely to ever be a real alias.

Then we need a new issue about duplicated aliases. The error & docs should explain an alias must be unique.

They also cant be modified, because they can only be allocated once. Any removal of an alias is a breakage.