[elpa] externals/xr updated (f51db5fffe -> 21af1135da)

[ELPA Syncer]

elpasync pushed a change to branch externals/xr.

      from  f51db5fffe Fix xr-pp-rx-to-str tests in Emacs 30
       new  07cd4a0d95 Rectify some doc strings
       new  5d393451a9 Faster tristate computation
       new  21af1135da Translate \w and \W to (syntax word) and (not (syntax 
word))


Summary of changes:
 xr-test.el | 26 +++++++++++++++++++++++++-
 xr.el      | 55 ++++++++++++++++++++++++++++++++++++++++++++-----------
 2 files changed, 69 insertions(+), 12 deletions(-)