TLDR
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fmt

 
Reformat a text file by joining its paragraphs and limiting the line width to given number of characters (75 by default). More information: https://www.gnu.org/software/coreutils/fmt.
 
  • Reformat a file:
     
    fmt {{path/to/file}}
     
  • Reformat a file producing output lines of (at most) n characters:
     
    fmt -w {{n}} {{path/to/file}}
     
  • Reformat a file without joining lines shorter than the given width together:
     
    fmt -s {{path/to/file}}
     
  • Reformat a file with uniform spacing (1 space between words and 2 spaces between paragraphs):
     
    fmt -u {{path/to/file}}

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