Summary: This is a small fix in a specific user message example. See other messages in the very same file which also use `<tt>`. Here the problematic phrase: {F292970} See the example in the phrase "Use lowercase letters, digits, and periods. For example: ...". Test Plan: After this change, the specific message "The URI where the OAuth server is installed. For example" from the page `/auth/config/edit/?provider=PhabricatorPhabricatorAuthProvider` does not have anymore backticks shown to the end user. Reviewers: O1 Blessed Committers, valerio.bozzolan Reviewed By: O1 Blessed Committers, valerio.bozzolan Subscribers: speck, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno Differential Revision: https://we.phorge.it/D25232