regex - Why doesn't the first replacement have any effect? -

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Most likely I am not clear here, but to search / replace it twice to search me Why is the need to effect the following code? If I call it only once, the replacement does not occur: - (

  Use strict; use precautions; LWP :: Simple; My $ youtubeCN = get (changes) @Argv); die ("script tag not found! \ N") Unless $ youtubecn = ~ /

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