[elpa] externals/xr updated (9048d15a8d -> 59b1f7acc6)

[ELPA Syncer]

elpasync pushed a change to branch externals/xr.

      from  9048d15a8d Increment version to 2.0
       new  d215c9bf4c Makefile: don't attempt to build unrelated files
       new  8259c08447 Add .gitignore
       new  e7009a6ca9 Refactor: list all char classes in a single place 
(almost)
       new  df7330b954 More generous ERT backtrace and printing settings
       new  666bf87a02 Improved superset check for empty strings, and diag 
extent
       new  1ed4caf4b5 Eliminate the empty string in sequences
       new  59b1f7acc6 add a FIXME


Summary of changes:
 .gitignore |   3 ++
 Makefile   |   5 +--
 xr-test.el |  43 +++++++++++++++++++++++
 xr.el      | 116 +++++++++++++++++++++++++++++--------------------------------
 4 files changed, 104 insertions(+), 63 deletions(-)
 create mode 100644 .gitignore