Berkeley CSUA MOTD:Entry 18218
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2024/12/24 [General] UID:1000 Activity:popular
12/24   

2000/5/9-10 [Computer/SW/Editors/Vi] UID:18218 Activity:nil
5/9     Try this: In vi, type in a paragraph that has its first line
        tab-indented. Then, go to the top of the paragraph, and !}fmt
        (Pipe the paragraph through fmt). It'll tab indent the first
        TWO lines of the paragraph. Here's where it gets wierd: Go
        down and delete the second tab. Go back up and !}fmt again.
        This time it doesn't add the second indent, it does what I
        wanted in the first place. Any theories on what's going on? -- Marco
        \_ The first time you probably had the paragrah all on one line.
           In that case it isn't really clear which you want so fmt guesses.
           Suggestion: use vim with tw and ai set and it will indent as you
           typel. --Galen
           \_ Nope, it happens with multiple-line paragraphs, not just
              single line paragraphs, where it would make sense. -- Marco
              \_ uhh.. it's a fmt bug?
                 \_ It must be something more than that, because you are
                    effectively giving fmt the *same* input and getting two
                    different results. My theory is something about how vi
                    deals with line breaks. -- Marco
                    \_ Ok...I think it is nothing to do with vi but is a
                       consequence fmt's design. If the first line is long
                       enough that fmt needs to break it then it will break it
                       even before it reads the second line. (I think fmt was
                       written as an old-skool unix filter and does no
                       buffering.) The second time through the first line is
                       not long enough to need to be broken so fmt doesn't do
                       this. In either case the second line is not indented so
                       by this time fmt knows you are indenting only the first
                       line (which is why only the first two lines are
                       indented). So: 1) it's a bug; 2) use par (or vim' gq
                       command) to avoid this. --Galen
2024/12/24 [General] UID:1000 Activity:popular
12/24   

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