[elpa] externals/xr updated (7afb247 -> a248977)

[Mattias Engdeg�rd]

mattiase pushed a change to branch externals/xr.

      from  7afb247   Increment version to 1.6
       new  db5f17b   Check suspicious curly-bracket constructs
       new  d6740ce   Detect misplaced `]' inside character alternatives
       new  a248977   Parse and lint skip set strings


Summary of changes:
 xr-test.el |  62 ++++++++++++++++
 xr.el      | 243 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 2 files changed, 292 insertions(+), 13 deletions(-)