$ echo "[extensions]" >> $HGRCPATH
$ echo "bookmarks=" >> $HGRCPATH
$ echo "mq=" >> $HGRCPATH
$ hg init
$ echo qqq>qqq.txt
add file
$ hg add
adding qqq.txt
commit first revision
$ hg ci -m 1 -u user -d "1 0"
set bookmark
$ hg book test
$ echo www>>qqq.txt
commit second revision
$ hg ci -m 2 -u usr -d "1 0"
set bookmark
$ hg book test2
update to -2
$ hg update -r -2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo eee>>qqq.txt
commit new head
$ hg ci -m 3 -u user -d "1 0"
created new head
bookmarks updated?
$ hg book
test 1:16b24da7e457
test2 1:16b24da7e457
strip to revision 1
$ hg strip 1
saved backup bundle to .*
list bookmarks
$ hg book
* test 1:9f1b7e78eff8
* test2 1:9f1b7e78eff8