documentation for the macro "pretty_policy"

Checks if the policy is easily readable

It is defined in the file build.m4.

m4 code:

define(`pretty_policy',
`define(`_policy_makefile_increments',`
check_pretty_policy:` policy.conf'`'`
patsubst(`! cat policy.conf | grep ";."',^,
`	')'
'_policy_makefile_increments)dnl
define(`_policy_tests',_policy_tests`\
		check_pretty_policy')')