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Weaken recommendation of Friedl book; fix reference
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@ -35,9 +35,9 @@ string notation.
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\begin{seealso}
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\seetitle{Mastering Regular Expressions}{Book on regular expressions
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by Jeffrey Friedl, published by O'Reilly. The Python
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material in this book dates from before the \refmodule{re}
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module, but it covers writing good regular expression
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by Jeffrey Friedl, published by O'Reilly. The second
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edition of the book no longer covers Python at all,
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but the first edition covered writing good regular expression
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patterns in great detail.}
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\end{seealso}
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@ -58,7 +58,7 @@ conditions that are no longer satisfied by \emph{pq}. Thus, complex
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expressions can easily be constructed from simpler primitive
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expressions like the ones described here. For details of the theory
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and implementation of regular expressions, consult the Friedl book
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referenced below, or almost any textbook about compiler construction.
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referenced above, or almost any textbook about compiler construction.
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A brief explanation of the format of regular expressions follows. For
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further information and a gentler presentation, consult the Regular
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