string parsing issue realted to quotes

[freudi74]

The tool seems to have two issues related to strings:

1. it doesn't handle single quotes as string delimiters
2. it doesn't handle escape quotes in strings.

An example with custom options:

enum Foo {
  NONE = 0 [(desc)="nothing selected"]; 
  ONE = 1 [(desc)='selected "one"']; // doesn't handle single quote properly
  TWO = 2 [(desc)="selected \"two\""]; // doesn't handle escaped double quote properly
}

It's kind of interesting that the github markdown seem to have the same issue :-)