In help page:
hg branch YOURBRANCHNAME should be in markdown code format (e.g.
hg branch YOURBRANCHNAME)
This particular issue should have its own section with an ID (e.g. <div id="createBranch"> or possibly even its own heading e.g. h2/h3 or similar) ** The page/message that links to here can then have its target URL altered to jump down to this section, e.g. a href="...help...#createBranch"