Elastishot v0.1.5

Added

• Lane alignment: when side-by-side columns move independently (a card
  whose left column gains a line while its right column stays), the row
  alignment leaves a stretch of short bands, inserts and deletes that make
  unchanged text look changed. Such a conflict zone is now cut at its
  gutters into lanes, each lane is aligned on its own, and the lane bands
  replace the zone's bands when they pair at least as many content cells
  exactly. Bands carry columns in report.json; the viewer draws each
  lane in its own row space and the pair page's Structure section names
  the lane. Padding that grew in a lane that did not (a card's inner
  margin) is not a region. The UI lab gained an eighth build for it.
• The viewer's toolbar has a "Hide regions" checkbox (attribute
  hide-regions, key r) that hides the region boxes in every mode,
  including Diff, so the pixels underneath can be read; the pair page has
  the same checkbox next to the mode buttons.

Fixed

• Rows of a gap with no edge whose colour matches the flat rows just
  outside it are padding that grew, whatever the colour; they no longer
  become an "added" or "removed" region of a card's background.