[elpa] externals/xr updated (a248977 -> 2136a7d)

[Mattias Engdeg�rd]

mattiase pushed a change to branch externals/xr.

      from  a248977   Parse and lint skip set strings
       new  f1afeff   Add check for `[...]'-framed skip sets
       new  d7325b3   Edit the package doc comment
       new  a948847   Don't complain about [z-a]
       new  51b1d81   More skip-set warnings
       new  2136a7d   Increment version to 1.9


Summary of changes:
 xr-test.el | 23 +++++++++++-----
 xr.el      | 91 +++++++++++++++++++++++++++++++++++++-------------------------
 2 files changed, 71 insertions(+), 43 deletions(-)