source: |
  include 'foo2';
  include "foo";
  include "001";
reference: |
  program
    statementOrScope
      statement
        includeStatement
          include
          'foo2'
          ;
    statementOrScope
      statement
        includeStatement
          include
          "foo"
          ;
    statementOrScope
      statement
        includeStatement
          include
          "001"
          ;
    <EOF>
