--- a/CHANGELOG	Thu Sep 12 12:35:42 2019 +0200
+++ b/CHANGELOG	Tue Sep 24 12:42:27 2019 +0200
@@ -18,6 +18,7 @@
   * fold: check allowdivergence before folding obsolete changesets (issue5817)
   * obslog: correct spacing of patch output with word-diff=yes (issue6175)
   * stack: make sure to preserve dependencies, fixes certain complex cases
+  * prune: improve documentation for `--pair`
 
 9.1.0 -- 2019-07-29
 -------------------