tests: use grep -E instead of obsolescent egrep Testing on Fedora 38 failed with: egrep: warning: egrep is obsolescent; using grep -E The warning comes from https://git.savannah.gnu.org/cgit/grep.git/commit/?id=a9515624709865d480e3142fd959bccd1c9372d1 . For further anecdotal evidence of the change, see https://www.phoronix.com/news/GNU-Grep-3.8-Stop-egrep-fgrep . This reverses the code check that goes back to e7d3b509af8b. grep -E is POSIX, but there is a risk that it doesn't work the same on all platforms - especially older Unix versions. It should however always be possible to put a GNU grep in $PATH before running the tests.

--- a/tests/test-convert-hg-svn.t	Mon Jun 26 11:15:30 2023 +0100
+++ b/tests/test-convert-hg-svn.t	Mon Jun 26 14:34:58 2023 +0200
@@ -1,7 +1,7 @@
 #require svn svn-bindings
 
   $ filter_svn_output () {
-  >     egrep -v 'Committing|Updating|(^$)' | sed -e 's/done$//' || true
+  >     grep -E -v 'Committing|Updating|(^$)' | sed -e 's/done$//' || true
   > }
 
   $ cat <<EOF >> $HGRCPATH