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Annotation of 43BSDTahoe/usr.lib/learn/editor/L41.1a, revision 1.1

1.1     ! root        1: #print
        !             2: One thing you must be careful of is that the substitute command does not
        !             3: know about word boundaries.  It will change the first occurrence of a
        !             4: letter string it matches without regard to blanks or punctuation around it.
        !             5: Thus, if the current line is
        !             6:    i would rather be the king
        !             7: and you type
        !             8:    s/the/a/p
        !             9: you get
        !            10:    i would raar be the king
        !            11: instead of
        !            12:    i would rather be a king
        !            13: Right?  You should always print lines after changing them to avoid
        !            14: missing such errors.  You can defend against them by increasing the
        !            15: amount of context you specify; in this case, for example, you could say
        !            16:    s/the /a /p
        !            17: and get
        !            18:    i would rather be a king
        !            19: Often the "$" operator is useful here, if you want to change the last
        !            20: thing on the line.  In the file 'text', the third line reads
        !            21:    never, never, never, never, never
        !            22: Edit this file to make the third line read
        !            23:   never, never, never, never, or hardly ever
        !            24: Rewrite the file and type "ready".
        !            25: #create Ref
        !            26: why should a dog, a horse, a rat, have life,
        !            27: and thou no breath at all? thou'lt come no more,
        !            28: never, never, never, never, or hardly ever
        !            29: pray you, undo this button.  thank you, sir.
        !            30: #create text
        !            31: why should a dog, a horse, a rat, have life,
        !            32: and thou no breath at all? thou'lt come no more,
        !            33: never, never, never, never, never
        !            34: pray you, undo this button.  thank you, sir.
        !            35: #user
        !            36: #cmp text Ref
        !            37: #log
        !            38: #next
        !            39: 42.1a 10
        !            40: 41.1b 5
        !            41: 42.2a 6

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