--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-revisions.t Wed Mar 28 09:36:02 2018 -0700
@@ -0,0 +1,37 @@
+ $ hg init repo
+ $ cd repo
+
+ $ echo 0 > a
+ $ hg ci -qAm 0
+ $ for i in 5 8 14 43; do
+ > hg up -q 0
+ > echo $i > a
+ > hg ci -qm $i
+ > done
+ $ cat <<EOF >> .hg/hgrc
+ > [alias]
+ > l = log -T '{rev}:{shortest(node,1)}\n'
+ > EOF
+
+ $ hg l
+ 4:7ba5d
+ 3:7ba57
+ 2:72
+ 1:9
+ 0:b
+ $ cat <<EOF >> .hg/hgrc
+ > [experimental]
+ > revisions.disambiguatewithin=:3
+ > EOF
+9 was unambiguous and still is
+ $ hg l -r 9
+ 1:9
+7 was ambiguous and still is
+ $ hg l -r 7
+ abort: 00changelog.i@7: ambiguous identifier!
+ [255]
+7b is no longer ambiguous
+ $ hg l -r 7b
+ 3:7ba57
+
+ $ cd ..