Fix: handle extra double quotes when empty value

[iliasbhal]

Issue

CSV wasn't handling this edge case correctly

http://transitupdateui.transitapp.com/notices/e28c03ed858a4128dd37ed1d6c1b5636

What has been done

• added a new case to the switch-like statement

Example

• will transform:
  1,"MB9","Broad St / Lincoln St","""""",42.343861898414,-71.5629380382858,0

• to :
  1,"MB9","Broad St / Lincoln St","",42.343861898414,-71.5629380382858,0

• instead of :
  1,"MB9","Broad St / Lincoln St",\"\\\",42.343861898414,-71.5629380382858,0

[gcamp]

Not even sure what is the correct behaviour in that case, should that really be transformed to ""?

[iliasbhal]

@gcamp Are you talking about empty strings vs empty cells? ,"", vs ,,

[iliasbhal]

@gcamp now it will remove all extra double-quotes and escape 2 double quotes.

new behavior:

• from string:
  1,"MB9","Broad St / Lincoln St","""""",42.343861898414,-71.5629380382858,0

• to string :
  1,"MB9","Broad St / Lincoln St","\\"\\"",42.343861898414,-71.5629380382858,0

• in JS, il will appear as "" when evaluated.
  [ 1, 'MB9', 'Broad St / Lincoln St' , '""' , 42.343861898414 , -71.5629380382858 0]

RFC link : https://tools.ietf.org/html/rfc4180