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Annotation of 42BSD/usr.lib/learn/editor/L35.2a, revision 1.1

1.1     ! root        1: #print
        !             2: The '*' character is also used in the editor patterns (the regular
        !             3: expressions) but it has quite a different meaning from '*'
        !             4: as used in filenames.  In the editor it means "any
        !             5: number of repetitions of the previous character."  Thus
        !             6:   a*
        !             7: might match "a" or "aa" or "aaa" or "aaaa" and so on.
        !             8: It might also match nothing, because "any number
        !             9: of repetitions" includes "zero"!  Perhaps it
        !            10: will be clearer after you do the following example.
        !            11: Note what happens to the two lines.  Type
        !            12: 
        !            13: ex file
        !            14: 1,2p
        !            15: 1s/xa*/xy/
        !            16: 2s/xa*/xy/
        !            17: 1,2p
        !            18: wq
        !            19: ready
        !            20: #create Ref
        !            21: abxy
        !            22: abxycd
        !            23: #create file
        !            24: abxaaa
        !            25: abxcd
        !            26: #user
        !            27: #cmp file Ref
        !            28: #log
        !            29: #next
        !            30: 35.2b 5

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