Fix PEP8 errors in Txtalert.
Fix PEP8 errors in Txtalert.

vishwaprakashmishra/xmatrix,TouK/vumi,vishwaprakashmishra/xmatrix,harrissoerja/vumi,vishwaprakashmishra/xmatrix,harrissoerja/vumi,TouK/vumi,TouK/vumi,harrissoerja/vumi