Matheus Tavares Bernardino <matheus.bernardino@xxxxxx> writes: > I noticed we also have some uses of + and ? in tests, with `grep -E` > (or egrep). Are we OK with ERE or did these maybe just slip in by > accident? We are OK with 'grep -E' and 'egrep' and write '+' and '?' as valid ERE elements. What we are not OK with is to invoke ERE elements in an expression that is supposed to be a BRE by prefixing a backslash, e.g. '\+'. Perhaps it is a GNU extension? We need to remove '\+' in t/perf/bisect_regression used with sed. What is sad is that this trick and "sed -E" are both GNUisms, and there is no portable way to use ERE with sed X-<. But we could resort to Perl in truly tricky cases ;-).
