Reduce cost of deletion in levenstein distance (4 -> 3)
Before this patch, a character deletion has the same cost as 2 swaps, or 4 additions, so Git prefers suggesting a completely scrambled command name to removing a character. For example, "git tags" suggests "stage", but not "tag". By setting the deletion cost to 3, we keep it higher than swaps or additions, but prefer 1 deletion to 2 swaps. "git tags" now suggests "tag" in addition to staged. Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Matthieu Moy committed
May 27, 2012 at 18:02 UTC
c41494f8c89c330cc9bd4629cdc3c428803e76bc
1 file changed
+1
-1
help.c
+1
-1
@@ -317,7 +317,7 @@ const char *help_unknown_cmd(const char *cmd)
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}
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main_cmds.names[i]->len =
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- levenshtein(cmd, candidate, 0, 2, 1, 4) + 1;
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+ levenshtein(cmd, candidate, 0, 2, 1, 3) + 1;
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}
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qsort(main_cmds.names, main_cmds.cnt,