Issue #2868173 by FeyP: Use strings prefixed by module name as requirement keys in hook_requirements()

Issue #2844565 by dhruveshdtripathi, yukare, nehakhadke: $this->t() should be used instead of t() for Drupal 8 version

Issue #2866206 by Mario Steinitz: PHP lint error in src/Controller/GeshiFilterConflicts(Forgot to do this change on previous commit).

Issue #2837129 by typhonius, FMB, intervalle, jussil: Provide a fallback for when the vendor directory when located above the docroot

Issue #2822271 by yukare: Install the geshi library via composer(remove libraries module from tests).

git authored Dec 17, 2015 and Fernando Conceição committed Dec 17, 2015

Issue #2629930 by meaton: Fatal Error When Trying to Manage the Display of a Field with a GeSHi Filter

This reverts commit 1fc724c8.

Wrong folder.