sync-version: fix warning on gnu grep #3695
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Without this commit, when using gnu grep (as found on Linuxes), sync-version emits warnings: $ scripts/sync-version grep: warning: ? at start of expression grep: warning: ? at start of expression grep: warning: ? at start of expression grep: warning: ? at start of expression grep: warning: ? at start of expression grep: warning: ? at start of expression CHANGELOG_VERSION: 0.28.1 VERSION: 0.28.1
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Summary
Without this commit, when using gnu grep (as found on Linuxes), sync-version emits warnings:
$ scripts/sync-version
grep: warning: ? at start of expression
grep: warning: ? at start of expression
grep: warning: ? at start of expression
grep: warning: ? at start of expression
grep: warning: ? at start of expression
grep: warning: ? at start of expression
CHANGELOG_VERSION: 0.28.1
VERSION: 0.28.1
I've tested these changes both on Linux and on macOS to make sure they work