Ace Gapfiller UI breaks with adjacent gaps

[chrahe]

When there are two gaps in the Ace Gapfiller UI separated by a single character and the first gap is able to expand in width, the gap starts expanding into the following gap which subsequently becomes impossible to access.

The reason for this is this line.

if (other.range.start.row === this.range.start.row && other.range.start.column > this.range.end.column) {

When the first gap expands, its end column is equal to the next gap's start column, so the condition does not trigger and the other gap is not shifted right as it should be. The issue can be resolved by comparing the start columns for both ranges.