pylint #22273 pylint --ignore option cannot be used multiple times [validation pending]

The --ignore option help says it can be used multiple times. Currently only the last option will be used: for example, with "pylint --ignore=tests --ignore=migrations" the tests module will not be ignored.

pylint 0.19.0,
astng 0.19.3, common 0.49.0
Python 2.6.1 (r261:67515, Jul 7 2009, 23:51:51)
[GCC 4.2.1 (Apple Inc. build 5646)]

done in0.24.0
load left0.000
closed by#5aa6eda6d3a4 Fix --ignore option documentation to match reality (closes #22273)