diff tests/test-obsolete.t @ 50725:7e5be4a7cda7 stable

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-obsolete.t	Mon Jun 26 11:15:30 2023 +0100
+++ b/tests/test-obsolete.t	Mon Jun 26 14:34:58 2023 +0200
@@ -1233,23 +1233,23 @@
 
 check explanation for an orphan, phase-divergent and content-divergent changeset
 
-  $ get-with-headers.py localhost:$HGPORT 'rev/50c51b361e60?style=paper' | egrep '(orphan|phase-divergent|content-divergent):'
+  $ get-with-headers.py localhost:$HGPORT 'rev/50c51b361e60?style=paper' | grep -E '(orphan|phase-divergent|content-divergent):'
    <td>orphan:  obsolete parent <a href="/rev/3de5eca88c00?style=paper">3de5eca88c00</a><br>
   phase-divergent:  immutable predecessor <a href="/rev/245bde4270cd?style=paper">245bde4270cd</a><br>
   content-divergent: <a href="/rev/6f9641995072?style=paper">6f9641995072</a> (draft) predecessor <a href="/rev/245bde4270cd?style=paper">245bde4270cd</a></td>
-  $ get-with-headers.py localhost:$HGPORT 'rev/50c51b361e60?style=coal' | egrep '(orphan|phase-divergent|content-divergent):'
+  $ get-with-headers.py localhost:$HGPORT 'rev/50c51b361e60?style=coal' | grep -E '(orphan|phase-divergent|content-divergent):'
    <td>orphan:  obsolete parent <a href="/rev/3de5eca88c00?style=coal">3de5eca88c00</a><br>
   phase-divergent:  immutable predecessor <a href="/rev/245bde4270cd?style=coal">245bde4270cd</a><br>
   content-divergent: <a href="/rev/6f9641995072?style=coal">6f9641995072</a> (draft) predecessor <a href="/rev/245bde4270cd?style=coal">245bde4270cd</a></td>
-  $ get-with-headers.py localhost:$HGPORT 'rev/50c51b361e60?style=gitweb' | egrep '(orphan|phase-divergent|content-divergent):'
+  $ get-with-headers.py localhost:$HGPORT 'rev/50c51b361e60?style=gitweb' | grep -E '(orphan|phase-divergent|content-divergent):'
   <td>orphan:  obsolete parent <a class="list" href="/rev/3de5eca88c00?style=gitweb">3de5eca88c00</a></td>
   <td>phase-divergent:  immutable predecessor <a class="list" href="/rev/245bde4270cd?style=gitweb">245bde4270cd</a></td>
   <td>content-divergent: <a class="list" href="/rev/6f9641995072?style=gitweb">6f9641995072</a> (draft) predecessor <a class="list" href="/rev/245bde4270cd?style=gitweb">245bde4270cd</a></td>
-  $ get-with-headers.py localhost:$HGPORT 'rev/50c51b361e60?style=monoblue' | egrep '(orphan|phase-divergent|content-divergent):'
+  $ get-with-headers.py localhost:$HGPORT 'rev/50c51b361e60?style=monoblue' | grep -E '(orphan|phase-divergent|content-divergent):'
   <dd>orphan:  obsolete parent <a href="/rev/3de5eca88c00?style=monoblue">3de5eca88c00</a></dd>
   <dd>phase-divergent:  immutable predecessor <a href="/rev/245bde4270cd?style=monoblue">245bde4270cd</a></dd>
   <dd>content-divergent: <a href="/rev/6f9641995072?style=monoblue">6f9641995072</a> (draft) predecessor <a href="/rev/245bde4270cd?style=monoblue">245bde4270cd</a></dd>
-  $ get-with-headers.py localhost:$HGPORT 'rev/50c51b361e60?style=spartan' | egrep '(orphan|phase-divergent|content-divergent):'
+  $ get-with-headers.py localhost:$HGPORT 'rev/50c51b361e60?style=spartan' | grep -E '(orphan|phase-divergent|content-divergent):'
   <td class="unstable">orphan:  obsolete parent <a href="/rev/3de5eca88c00?style=spartan">3de5eca88c00</a></td>
   <td class="unstable">phase-divergent:  immutable predecessor <a href="/rev/245bde4270cd?style=spartan">245bde4270cd</a></td>
   <td class="unstable">content-divergent: <a href="/rev/6f9641995072?style=spartan">6f9641995072</a> (draft) predecessor <a href="/rev/245bde4270cd?style=spartan">245bde4270cd</a></td>