fix(assert): fix swapping of multiline str diff #3685
Merged
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This PR fixes the bug of multiline str diff when there are more diff lines in
actual
thanexpected
.The multiline diff algorithm (
diffstr
) performs diffing in 2 different ways: First it takes diff of the entire multiple string, comparing each line. Then it takes diff of words for each line over the combination of added (expected
) lines and removed (actual
) lines.When computing word diffs for each line combination, the code swaps the main array to use for the loop (probably for optimization), but it forgot to swap diffing target. It resulted in swapped diff when there are more removed (
actual
) lines.closes #3039
closes #3681
ref #948