repoview: rename '_getdynamicblockers' to 'revealedrevs' (API)

Recent mailing list discussion made me realised we could clarify these. We make
the function "public" to encourage extensions to wrap it and we use a more
explicit name that mirror "hideablerevs".

hgext/rebase.py

@@ -1537,4 +1537,4 b' def uisetup(ui):'
     cmdutil.afterresolvedstates.append(
         ['rebasestate', _('hg rebase --continue')])
     # ensure rebased rev are not hidden
-    extensions.wrapfunction(repoview, '_getdynamicblockers', _rebasedvisible)
+    extensions.wrapfunction(repoview, 'revealedrevs', _rebasedvisible)

mercurial/repoview.py

@@ -32,7 +32,7 b' def hideablerevs(repo):'
     lead to crashes."""
     return obsolete.getrevs(repo, 'obsolete')
 
-def _getdynamicblockers(repo):
+def revealedrevs(repo):
     """Non-cacheable revisions blocking hidden changesets from being filtered.
 
     Get revisions that will block hidden changesets and are likely to change,
@@ -185,7 +185,7 b' def computehidden(repo):'
 
         # check if we have wd parents, bookmarks or tags pointing to hidden
         # changesets and remove those.
-        dynamic = hidden & _getdynamicblockers(repo)
+        dynamic = hidden & revealedrevs(repo)
         if dynamic:
             blocked = cl.ancestors(dynamic, inclusive=True)
             hidden = frozenset(r for r in hidden if r not in blocked)