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Cleanup edit groups after coalescing
Even with an optimal diffing algoritm, coalescing adjacent edit groups may cause the corresponding pair of strings for an edit group to have leading or trailing spans of equal elements. While this is technically a correct representation of a diff, it is a suboptimal outcome. As such, scan through all unequal groups and move leading/trailing equal spans to the preceding/succeeding equal group. Before this change: strings.Join({ "org-4747474747474747,bucket-4242424242424242:m,tag1=a,tag2=aa", - ",#=_value _value=2 ", + " _value=2 ", `11 org-4747474747474747,bucket-4242424242424242:m,tag1=a,tag2=bb`, - ",#=_value _value=2 2", + " _value=2 2", `1 org-4747474747474747,bucket-4242424242424242:m,tag1=b,tag2=cc`, - ",#=_value", ` _value=1 21 org-4747474747474747,bucket-4242424242424242:m,tag1`, "=a,tag2", - "=dd,#=_value", + "=dd", ` _value=3 31 org-4747474747474747,bucket-4242424242424242:m,tag1`, - "=c,#=_value", + "=c", ` _value=4 41 `, }, "") After this change: strings.Join({ "org-4747474747474747,bucket-4242424242424242:m,tag1=a,tag2=aa", - ",#=_value", ` _value=2 11 org-4747474747474747,bucket-4242424242424242:m,tag1`, "=a,tag2=bb", - ",#=_value", ` _value=2 21 org-4747474747474747,bucket-4242424242424242:m,tag1`, "=b,tag2=cc", - ",#=_value", ` _value=1 21 org-4747474747474747,bucket-4242424242424242:m,tag1`, "=a,tag2=dd", - ",#=_value", ` _value=3 31 org-4747474747474747,bucket-4242424242424242:m,tag1`, "=c", - ",#=_value", ` _value=4 41 `, }, "")
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