We need this information in the frontend to:
* Display the 'view in playground' option for locally echoed messages.
* When we add a UI settings for realm admins to configure their
playground choices, we'll need to use these canonicalized aliases
for displaying the option.
Hence, this tweaks the tool which generates pygments_data.json to contain
the data we need.
Bumping major PROVISION_VERSION since folks need to provision in both
directions.
Tests amended.
Fixes#2665.
Regenerated by tabbott with `lint --fix` after a rebase and change in
parameters.
Note from tabbott: In a few cases, this converts technical debt in the
form of unsorted imports into different technical debt in the form of
our largest files having very long, ugly import sequences at the
start. I expect this change will increase pressure for us to split
those files, which isn't a bad thing.
Signed-off-by: Anders Kaseorg <anders@zulip.com>