perldelta for readline ignores EAGAIN, EWOULDBLOCK

Author: tonycoz

pod/perldelta.pod

@@ -378,7 +378,10 @@ manager will later use a regex to expand these into links.
 
 =item *
 
-XXX
+L<perlfunc/readline> now clears the error flag if an error occurs when
+reading and that error is C<EAGAIN> or C<EWOULDBLOCK>.  This allows
+old code that depended on C<readline> to clear all errors to ignore
+these relatively harmless errors.  [GH #22883]
 
 =back