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Annotation of 43BSD/usr.lib/learn/files/L7.2a, revision 1.1

1.1     ! root        1: #print
        !             2: Sometimes ? is too flexible, and you
        !             3: only want to allow a few characters.  For example,
        !             4: you might want to abbreviate
        !             5:   ls memo.ab memo.ac
        !             6: without picking up "memo.ad", "memo.ae", and so forth.
        !             7: You can match one of a set of particular characters by 
        !             8: putting them in brackets "[]" in the list you use with "ls".
        !             9: For example,
        !            10:   [bc]
        !            11: matches either b or c but no other letters.  Thus
        !            12:   ls memo.a[bc]
        !            13: will list exactly "memo.ab" and "memo.ac" if present.
        !            14: 
        !            15: How many of the files
        !            16:   xya, xyb, xyc, xyd
        !            17: exist in this directory?
        !            18: Type "answer N" where N is the number.
        !            19: #create xyb
        !            20: #create xyc
        !            21: #create xye
        !            22: #create xyf
        !            23: #create xy1
        !            24: #copyin
        !            25: #user
        !            26: #uncopyin
        !            27: #match 2
        !            28: #log
        !            29: #next
        !            30: 7.2b 10

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