dagop: comment why revancestors() doesn't heapify input revs at once I wondered why we're doing this complicated stuff without noticing the input revs may be iterated lazily in descending order. c1f666e27345 showed why.

dagop: unnest inner generator of revancestors() This just moves iterate() to module-level function.

hgweb: plug followlines action in annotate view Add the followlines.js script and corresponding parameters as data attribute on <tbody class="sourcelines"> element. Extend CSS rules so that they also match the DOM structure of annotate view. As previously, only address paper and gitweb styles (other styles do not have followlines at all).

hgweb: parameterize the tag name of elements holding followlines selection While plugging followlines.js into "annotate" view, we'll need to walk a different DOM structure from that of "filerevision" view. In particular, the selectable source line element is a <tr> in annotate view (in contrast with a <span> in filerevision view). So make this tag name a parameter of followlines.js script by passing its value as a "selectabletag" data attribute of <pre class="sourcelines"> element. As <pre class="sourcelines"> tags are getting quite long in templates, rewrite them on several lines.

gitweb: wrap table rows of annotate view into a <tbody> element We will use this element to hook data attribute for the followlines.js script to be plugged in annotate view. Also this gets symmetrical with paper style which already has a <tbody> element.

tests: update regex check for fetch error in test-clonebundles.t On some systems, e.g. Docker container, the actual error may be: error fetching bundle: [Errno 99] Cannot assign requested address Update the regex to handle this case.