20160830__az__primary__navajo__precinct.csv has strange precinct names

[warwickmm]

2016/counties/20160830__az__primary__navajo__precinct.csv has some strange trailing characters in the precinct names. Other files don't have this, so it's possible that there was an error parsing the original source.

For example, the precinct names for the first few rows are

RED BUTTE 1.0/1.1
PAINTED DESERT 2.0/1/2/3/4      
HUBBELL 3.0/3.1         
BLACK BUTTES 4.0/1/2/3/4/5      
CEDAR VALLEY 5.0/1/2/3  
STONE BUTTE 6.0/6.1     
PIONEER 
ANTELOPE 8.0-8.13       
JUNIPER 9.0/1/2/3/4/5/6/7