Introduce tests
Migrate an example to a spec
One more spec for issue #81
Spec
Tests for issue 130
Spec for issue 108
Spec for issue 132
Merge branch 'tests'

* tests:
  Spec for issue 132
  Spec for issue 108
  Tests for issue 130
  Spec
  One more spec for issue #81
  Migrate an example to a spec
  Introduce tests
Fix continuation issue again

A spec was implemented for https://github.com/vim-ruby/vim-ruby/issues/139.

The issue this commit fixes is: https://github.com/vim-ruby/vim-ruby/issues/132.

By adding the `Symbol` group to the "string or syntax" pattern, some
continuations are fixed. It should not be added to the "string" pattern,
however.