fmt

fmt - simple optimal text formatter.

Format a multi-line text file in just one:

fmt file.txt

Specify the maximum line size:

fmt -w 25 file.txt

Add indentation in the paragraph:

fmt -t file.txt

Automatically split very long lines:

fmt -s file.txt

Format text using one space between words and two between sentences:

fmt -u file.txt

Display help and exit:

fmt --help

Display version information and exit:

fmt --version