record: update comment to match code

Commit 205599e31870 changed how newfiles get passed to commitfunc, but
did not change the corresponding comment that explains this. This
commit also updates this comment.

hgext/record.py

@@ -603,9 +603,7 b' def dorecord(ui, repo, commitfunc, cmdsu'
             #    patch. Now is the time to delegate the job to
             #    commit/qrefresh or the like!
 
-            # it is important to first chdir to repo root -- we'll call
-            # a highlevel command with list of pathnames relative to
-            # repo root
+            # Make all of the pathnames absolute.
             newfiles = [repo.wjoin(nf) for nf in newfiles]
             commitfunc(ui, repo, *newfiles, **opts)