That just puts 'the' in front of the last fox, without considering the forest at all. It doesn't put 'the' in front of the last fox before a forest, except when that also happens to be the last fox on the line. That is, it will turn 
    fox comes and fox goes into the forest. No fox left

[download]
into 
    fox comes and fox goes into the forest. No the fox left

[download]

In reply to Re^2: regexp find last word by Anonymous Monk
in thread regexp find last word by Murcia

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