X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=dsf.c;h=aa22392661407f04abddec745b0a6e292db12aa5;hb=a0a581c8b5422bf0c5ed3fde6aa25811e4eb89fc;hp=f60ddc0cbdb4b9a68e7fa5ab52c9f4ab9bb7ff03;hpb=72922b307822874862d943893b10ac75d01689d2;p=sgt-puzzles.git

diff --git a/dsf.c b/dsf.c
index f60ddc0..aa22392 100644
--- a/dsf.c
+++ b/dsf.c
@@ -165,7 +165,7 @@ void edsf_merge(int *dsf, int v1, int v2, int inverse)
 	 * We always make the smaller of v1 and v2 the new canonical
 	 * element. This ensures that the canonical element of any
 	 * class in this structure is always the first element in
-	 * it.
+	 * it. 'Keen' depends critically on this property.
 	 *
 	 * (Jonas Koelker previously had this code choosing which
 	 * way round to connect the trees by examining the sizes of