fmt [-WIDTH] [OPTION]... [FILE]...
!subtitle:功能
简单文本格式化。
!subtitle:类型
可执行文件（/usr/bin/fmt），属于 coreutils。
!subtitle:参数
WIDTH - 每行宽度；同 -w 选项，默认为 75
OPTION 选项：
-c, --crown-margin - 保留前两行的缩进
-p, --prefix=STRING - 仅格式化以 STRING 开头的行，并将前缀重新附加到格式化的行
-s, --split-only - 拆分长行，但不补充
-t, --tagged-paragraph - 第一行的缩进与第二行不同
-u, --uniform-spacing - 单词之间空一格，句子之后空两格
-w, --width=WIDTH - 每行宽度；默认为 75
-g, --goal=WIDTH - 目标宽度（单词提前换行）；默认为行宽的 93%
--help - 显示帮助
--version - 显示版本
FILE 文件列表；如果没有这个参数或指定为 -，则读取标准输入
$ echo 'Primers 编程伙伴 https://xplanc.org/primers/' > 1.txt # 创建文件
$ cat 1.txt # 查看文件
Primers 编程伙伴 https://xplanc.org/primers/
$ fmt -w 40 1.txt # 行宽度 40
Primers 编程伙伴
https://xplanc.org/primers/
$ fmt -w 40 -g 10 1.txt # 行宽度 40 目标宽度 10
Primers
编程伙伴
https://xplanc.org/primers/
FMT(1) User Commands FMT(1)
NAME
fmt - simple optimal text formatter
SYNOPSIS
fmt [-WIDTH] [OPTION]... [FILE]...
DESCRIPTION
Reformat each paragraph in the FILE(s), writing to standard output.
The option -WIDTH is an abbreviated form of --width=DIGITS.
With no FILE, or when FILE is -, read standard input.
Mandatory arguments to long options are mandatory for short options
too.
-c, --crown-margin
preserve indentation of first two lines
-p, --prefix=STRING
reformat only lines beginning with STRING, reattaching the pre‐
fix to reformatted lines
-s, --split-only
split long lines, but do not refill
-t, --tagged-paragraph
indentation of first line different from second
-u, --uniform-spacing
one space between words, two after sentences
-w, --width=WIDTH
maximum line width (default of 75 columns)
-g, --goal=WIDTH
goal width (default of 93% of width)
--help display this help and exit
--version
output version information and exit
AUTHOR
Written by Ross Paterson.
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
COPYRIGHT
Copyright © 2023 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/fmt>
or available locally via: info '(coreutils) fmt invocation'
GNU coreutils 9.4 April 2024 FMT(1)