Read text, such as commit messages, notes, tags and branch
descriptions, from the standard input and clean it in the manner
used by Git.
With no arguments, this will:
-
remove trailing whitespace from all lines
-
collapse multiple consecutive empty lines into one empty line
-
remove empty lines from the beginning and end of the input
-
add a missing \n to the last line if necessary.
In the case where the input consists entirely of whitespace characters, no
output will be produced.
NOTE: This is intended for cleaning metadata. Prefer the --whitespace=fix
mode of git-apply(1) for correcting whitespace of patches or files in
the repository.