Interesting. Never thought about it that way before.
indent - indent and format C program source
HISTORY
The indent command appeared in 4.2BSD.
NAME
cb - C program beautifier
SYNOPSIS
cb
DESCRIPTION
Cb places a copy of the C program from the standard input on the stan-
dard output with spacing and indentation that displays the structure of
the program.You want the compilers knowledge of the code for this, e.g. while formating C++ template mess.
There's a tight integration into the actual toolchains, which is a good thing.
This is the type of error that any static analysis tool would easily pick.
Having cast-in-stone formatting rules makes code review easier and shorter and avoids lots of arguments. For ultra-dangerous languages like C++, automatic formatting is indispensable.