Support for this feature was added in the 2.5 cycle but the UI portion was backed out prior to release: http://mercurial.markmail.org/thread/c4qybinbf3owja2m We'd like to re-enable this with an improved UI.
Fixed by http://selenic.com/repo/hg/rev/9e1f4c65f5f5 Anton Shestakov <engored@ya.ru> hgweb: allow viewing diffs against p1 or p2 for merge commits (issue3904) This adds UI portion of the feature that has resided in mercurial since 2012. Back then the interface was added together with the code, but was shortly backed out because it was deemed "not ready". Code, however, stayed. For the original feature and its implementation, see issue2810 and d605a82cf189. In short, the backed-out interface had two outstanding issues: 1. it was introducing an entirely new term (baseline) and 2. it was present on every changeset's page, even for changesets with 1 parent (or no parents), which didn't make sense This patch implements a hopefully better interface because: 1. it uses the usual terms (diff) and 2. it only shows up when there actually are 2 parents. (please test the fix)
Bulk testing -> fixed