[elpa] externals/compat updated (a28c94d6b2 -> 3d8c6f8810)

[ELPA Syncer]

elpasync pushed a change to branch externals/compat.

      from  a28c94d6b2 Unmention read-multiple-choice as an unimplemented 
function
       new  dd48603a13 Rewrite comapt.texi
       new  99d48709ad Replace rx expression with its macroexpansion
       new  969a7f250c Refer to the manual from the commentary section
       new  3d8c6f8810 Remove note that said alist-get couldn't be used as a gv


Summary of changes:
 compat-28.el |   33 +-
 compat.el    |    7 +-
 compat.texi  | 1901 ++++++++++++++++++++++++++++++++++++++++++++++------------
 3 files changed, 1522 insertions(+), 419 deletions(-)