Slightly different input in test_irregular_matrix. Added few whitespaces in compliance with PEP8.
Slightly different input in test_irregular_matrix. Added few whitespaces in compliance with PEP8.

ZacharyRSmith/xpython,exercism/xpython,smalley/python,N-Parsons/exercism-python,pombredanne/xpython,oalbe/xpython,exercism/python,behrtam/xpython,outkaj/xpython,orozcoadrian/xpython,jmluy/xpython,exercism/python,smalley/python,pombredanne/xpython,wobh/xpython,wobh/xpython,Peque/xpython,de2Zotjes/xpython,mweb/python,behrtam/xpython,jmluy/xpython,N-Parsons/exercism-python,mweb/python,rootulp/xpython,oalbe/xpython,rootulp/xpython,ZacharyRSmith/xpython,pheanex/xpython,Peque/xpython,de2Zotjes/xpython,outkaj/xpython,orozcoadrian/xpython,pheanex/xpython,exercism/xpython