Replace egrep usage with grep -E
authorMichael Prokop <mika@grml.org>
Wed, 7 Sep 2022 11:52:33 +0000 (13:52 +0200)
committerMichael Prokop <mika@grml.org>
Wed, 7 Sep 2022 11:53:05 +0000 (13:53 +0200)
grep 3.8 deprecated support for egrep + fgrep, and now prints a warning on stderr:

| egrep: warning: egrep is obsolescent; using grep -E
| fgrep: warning: fgrep is obsolescent; using grep -F

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