[elpa] externals/compat updated (aaf2139835 -> b416a89d4b)

[ELPA Syncer]

elpasync pushed a change to branch externals/compat.

      from  aaf2139835 Always load all compat files during testing
       new  020ae66608 Add file-name-absolute-p from Emacs 28
       new  b416a89d4b Remove (elisp) manual prefix from links


Summary of changes:
 MANUAL          | 209 ++++++++++++++++++++++++++---------------------------
 compat-27.el    |  38 ++++++++++
 compat-tests.el |  14 ++++
 compat.texi     | 217 +++++++++++++++++++++++++++++---------------------------
 4 files changed, 270 insertions(+), 208 deletions(-)