update manuscript
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@@ -61,7 +61,7 @@ John Black is my name.
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## Use regex on a string
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We can use the result of `bash`'s regex matching to replace `sed` for a
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The result of `bash`'s regex matching can be used to replace `sed` for a
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large number of use-cases.
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**CAVEAT**: This is one of the few platform dependant `bash` features.
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