sort: Fix typo in Stable() comment
Correct 'an' to 'on' in the comment above the Stable() function.
Change-Id: I714e38b2d3a79dfd539d5368967d1c6b519cb948
Reviewed-on: https://go-review.googlesource.com/13662
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/src/sort/sort.go b/src/sort/sort.go
index 0a446c8..c7c3042 100644
--- a/src/sort/sort.go
+++ b/src/sort/sort.go
@@ -300,7 +300,7 @@
// V. Raman in Algorithmica (1996) 16, 115-160:
// This algorithm either needs additional 2n bits or works only if there
// are enough different elements available to encode some permutations
-// which have to be undone later (so not stable an any input).
+// which have to be undone later (so not stable on any input).
// - All the optimal in-place sorting/merging algorithms I found are either
// unstable or rely on enough different elements in each step to encode the
// performed block rearrangements. See also "In-Place Merging Algorithms",
