toy test easyconfig file in format v2

gistfile1.txt

# EASYCONFIGFORMAT 2.0
# this is a version test
"""
docstring test
@author: Stijn De Weirdt (UGent)
@maintainer: Kenneth Hoste (UGent)
"""
name = "toy"

homepage = 'http://hpcugent.github.com/easybuild'
description = "Toy C program."

sources = ['%(name)s-0.0.tar.gz']  # purposely fixed to 0.0
checksums = ['f09dca47638869866e28c9f44aadc111']  # (MD5) source checksum

sanity_check_paths = {
    'files': [('bin/yot', 'bin/toy')],
    'dirs': ['bin'],
}

moduleclass = 'tools'

[SUPPORTED]
versions = 1.0, 0.0, 1.5, 2.0, 3.0
toolchains = goolf == 1.4.10, dummy == dummy

[> 1.0]
# all 1.x versions and more recent are 'stable'
versionprefix = 'stable-'
[[<= 1.5]]
# custom suffix for 'early' 1.x releases
versionsuffix = '-early'

[> 2.0]
# v2.x and up is considered stable mature
versionsuffix = '-mature'

what is this supposed to mean?