[elpa] externals/compat f3c4dbd7da: Update readme

[ELPA Syncer]

branch: externals/compat
commit f3c4dbd7da3f14d104e94fdb7dd0291fc6456536
Author: Daniel Mendler <mail@daniel-mendler.de>
Commit: Daniel Mendler <mail@daniel-mendler.de>

    Update readme
---
 compat.texi | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/compat.texi b/compat.texi
index 2e013ccd26..7c18051fbc 100644
--- a/compat.texi
+++ b/compat.texi
@@ -253,11 +253,16 @@ benefits would be small given that Compat does not 
override existing
 definitions.
 
 @item
-New functionality depends on an entire new, non-trivial library.
-Sometimes these are provided via ELPA (xref, project, seq, map,
-@dots{}), but other times it would be infeasible to duplicate an
-entire library within Compat while also providing the necessary
-backwards compatibility.
+The definition belongs to an Emacs core package, which is also
+distributed via ELPA.  Compat does not have to provide backward
+compatibility for core packages since the updated package can be
+installed directly from ELPA. Examples include xref, project, seq, map
+and transient.
+
+@item
+New functionality depends on an entire new, non-trivial core library,
+which is infeasible to duplicate within Compat while also providing
+the necessary backwards compatibility.
 
 @item
 New functionality was implemented in the C core, and depends on