Martin von Zweigbergk <martinvonz@google.com> [Sat, 27 May 2017 21:08:51 -0700] rev 32612
hidden: rename "revealedrevs" to "pinnedrevs" (API)
E.g. tags and bookmarks can reveal revisions that would otherwise be
hidden. A revision can also be revealed because one if its descendants
is visible. Let's use the term "pinned" for the former case
(bookmarks etc.).