8801d1640b
Changes in behavior: * The -P option is now based on PCRE2. * The egrep and fgrep commands now warn that they are obsolescent and should be replaced by grep -E and grep -F. * The confusing GREP_COLOR environment variable is now obsolescent. * Regular expressions with stray backslashes now cause warnings. * Regular expressions or subexpressions that start with a repetition operator now also cause warnings. * Regular expressions like [:space:] are now errors even if POSIXLY_CORRECT is set. |
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