Currently, we have markdown files in many places (e.g. comments, new
issues, etc.). This Merge Request detects if the file being edited is a
markdown file and adds markdown buttons and their functionality to the
single file editor (Not the web IDE)
This saves about 128 MB of baseline RAM usage per Unicorn and
Sidekiq process (!).
Linguist wasn't detecting languages anymore from CE/EE since
9ae8b57467. However, Linguist::BlobHelper
was still being depended on by BlobLike and others.
This removes the Linguist gem, given it isn't required anymore.
EscapeUtils were pulled in as dependency, but given Banzai depends on
it, it is now added explicitly.
Previously, Linguist was used to detect the best ACE mode. Instead,
we rely on ACE to guess the best mode based on the file extension.
Phil Hughes