On 2022-10-21 at 14:15, Greg Wooledge wrote: > So... yeah, \< and/or \> clearly have some special meaning to GNU > sed. Good luck figuring out what that is.
'info sed', section 'sed regular expressions', subsection 'regular expression extensions': >> '\<' >> Matches the beginning of a word. >> >> $ echo "abc %-= def." | sed 's/\</X/g' >> Xabc %-= Xdef. >> >> '\>' >> Matches the end of a word. >> >> $ echo "abc %-= def." | sed 's/\>/X/g' >> abcX %-= defX. IOW, each seems to be half of the usual '\b' (edge of a word) set. With the default sed behavior (not sure whether that's basic regular expressions or extended regular expressions, in the nomenclature of the info document), you can use replace the latter with an alternation of both of the former: echo 'a b c' | sed 's/\(\<\|\>\)b\b//' a c echo 'a b c' | sed 's/\bb\b//' a c -- The Wanderer The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. -- George Bernard Shaw
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