fix: include cleanupnodes() in transaction
As pointed out by Yuya, we need a transaction to make sure the state
before the call to cleanupnodes() is not observable.
Differential Revision: https://phab.mercurial-scm.org/D3823
default = 'changelog'
feedupdated = '<updated>{date|rfc3339date}</updated>'
mimetype = 'application/atom+xml; charset={encoding}'
header = header.tmpl
changelog = changelog.tmpl
changelogentry = changelogentry.tmpl
filelog = filelog.tmpl
tags = tags.tmpl
tagentry = tagentry.tmpl
bookmarks = bookmarks.tmpl
bookmarkentry = bookmarkentry.tmpl
branches = branches.tmpl
branchentry = branchentry.tmpl
error = error.tmpl
filedifflink = '{file|escape}<br />'
fileellipses = '{file|escape}<br />'
filenodelink = '{file|escape}<br />'
filenolink = '{file|escape}<br />'