[elpa] externals/xr updated (5b08350 -> 952276b)

[Mattias Engdegård]

mattiase pushed a change to branch externals/xr.

      from  5b08350   Increment version to 1.3
       new  6085257   Detect overlap in character alternatives
       new  74b5287   Turn negative empty sets into anything
       new  952276b   Add dialect option and improve pretty-printing


Summary of changes:
 xr-test.el |  79 +++++++++++++---
 xr.el      | 304 ++++++++++++++++++++++++++++++++++++++++++-------------------
 2 files changed, 277 insertions(+), 106 deletions(-)