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-rw-r--r--dsf.c2
1 files changed, 1 insertions, 1 deletions
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