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[FWP] Substitution

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On 21 Jun 1999 12:14:00 -0400, Chaim Frenkel wrote:

>I'd agree with you if the _pattern_ were more complex
>than fixed strings.

The generic problem (changing $pat to $s1 the first time, and to $s2
afterwards) is the same if $pat is a regular expression, so the
solutions offered do still work.

>Hmm, Since the replacement text must be unique in the document
>after replacement,

Why? That's not a precondition of the stated problem.

                                                       /L/e/k/t/u

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