fix(gtfsplus): trim extra spaces from fields

lib/gtfsplus/reducers/gtfsplus.js

@@ -3,7 +3,6 @@
 import update from 'react-addons-update'
 
 import {constructNewGtfsPlusRow} from '../util'
-
 import type {Action} from '../../types/actions'
 import type {GtfsPlusReducerState} from '../../types/reducers'
 
@@ -58,7 +57,7 @@ const gtfsplus = (
           continue
         }
         const fields = lines[0].split(',')
-        const COLUMN_REGEX = /,(?=(?:(?:[^"]*"){2})*[^"]*$)/
+        const COLUMN_REGEX = / *, *(?=(?:(?:[^"]*"){2})*[^"]*$)/
         const tableName = filename.split('.')[0]
         newTableData[tableName] = lines.slice(1)
         // Do not include blank lines (e.g., at the end of the file).