Adjacent strings auto-concatenation not implemented in Frog

[sethladd]

The removal of + from String has necessitated a way to handle long, multi-line strings. The proposed solution:

var superLongString = 'this is a crazy long string and yet I cannot stop typing it'
                                 'even after I go to another line the typing, it just does not stop';

This is not yet implemented in Frog.

[kasperl]

Fixed in r5224.

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Added Fixed label.