agree, and the author continues to use double quotes around search pattern despite showing an example where single quote was needed! As a good practice, I alwa

agree, and the author continues to use double quotes around search pattern despite showing an example where single quote was needed! As a good practice, I always try to single quote the expression, even if it is not needed. Use double quote only when needed and even then, use it only for the portion required, not for the entire expression. https://mywiki.wooledge.org/Quotes https://mywiki.wooledge.org/Quotes is a must read.