edit: previous and next with $ and ^ are broken.

`.-/^/` should match the start of the current line. It does not. Instead, it matches `.`. `^` incorrectly matches the start of the input. Reverse matches scan forward for the last match, and return the empty string just before `.` if all previous matches are empty. When scanning forward, each match will be the empty string at the start of the input, ending with the empty string before `.`.

`.-/$/` should match the end of the previous line. It does not. Instead, it matches `.`. `$` incorrectly matches the end of the input. Reverse matches scan forward for the last match. The last match of `$` is the end of input.

`.+/^/` should match the start of the next line. It does not. Instead, it matches `.`. `^` incorrectly matches the start of the input.

No file or test is named in the issue. Start by locating the edit implementation that handles forward and reverse matches for ^ and $, then add regression coverage for the described line-boundary cases. Done means the listed expressions match the current, previous, or next line boundaries as specified.

Written by the indexing model from the issue text.