mjpieters added a comment. The `import` parentheses collapsing is described here: https://github.com/ambv/black#parentheses. The behavior is not configurable. REPOSITORY rHG Mercurial REVISION DETAIL https://phab.mercurial-scm.org/D5064 To: mjpieters, indygreg, durin42, #hg-reviewers Cc: mercurial-devel