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by simcop2387
3793 days ago
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The original version isn't actually valid POSIX BRE. It's a sed specific meta-character that is specific to sed and won't work anywhere else [1]. It's not part of POSIX BRE (which doesn't cover substations anyway). The zero width positive look behind is common to many more languages than just sed for doing that substitution. There is one version that will work in all of them, s/rump/rump kernel/, but it repeats the first word [1] http://docstore.mik.ua/orelly/unix/sedawk/appa_02.htm |
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