obsolete: populate successors, precursors, children lazily The precursors and children dictionaries are not used by many commands. By making them lazily populated, 'hg log -r @~10::@ >/dev/null' is sped up from 0.564s to 0.440s on my hg.hg repo with 73k markers. Also make successors lazily populated, mostly for consistency with the others.

obsolete: pass only new markers to _checkinvalidmarkers() We will soon delay populating precursors until we have to. To prepare for that, make _checkinvalidmarkers() scan for a nullid precursor in the list of new markers instead of the (currently) cheaper 'if nullid in precursors' check.

obsolete: extract helpers from _load() In preparation for making the successors, precursors, and children dictionaries lazily populated, break up _load() into one function for adding markers to each dictionary.

test-gendoc: require gettext If the gettext utilities aren't installed, there is no way to make the translations. This causes the gettext client to fall back to the untranslated message, which triggers "** NOTHING TRANSLATED **" errors and a test failure.

hgweb: use css margin instead of empty <p> before diffstat table The <p> elements were used to create an empty space between the diffstat link and the diffstat table, but they don't have any semantic meaning, so it is better to use css instead. Default margins for <p> elements can differ depending on the browser, but usually the margin is 1em (exceptions are IE 6 and 7 with 14pt, which is comparable). The css rule sets top margin to 1em. This change is a "better version" of 70cfa7e1611b, where <p> elements were simply properly closed.

hgweb: use css margin instead of empty <p> before <div class="atom-logo"> The <p> elements were used to create an empty space between the last menu item (i.e. "help") and the atom feed icon, but they don't have any semantic meaning, so it is better to use css instead. The css rule uses top margin of 10px, which is equal to the top margin of the menu blocks ("help", "changeset, browse", etc). Previously, with <p> elements, the margin wasn't set explicitly and was browser-dependent. This change is a "better version" of 70cfa7e1611b, where <p> elements were simply properly closed.

error: update docstring on ParseError It's now used by revsets and filesets.

dispatch: consolidate formatting of ParseErrors

error: store filename and message on LookupError for later It may be useful to be able to get to the failed path and the underlying error message when catching a LookupError, so let's make them accessible.

bundle2.unbundlepart: implement seek() This implements a seek() method for unbundlepart. This allows on-disk bundle2 parts to behave enough like files for bundlerepo to handle them. A future patch will add support for bundlerepo to read the bundle2 files that are written when the experimental.strip-bundle2-version config option is used.