text: var jsp = require("./parse-js"),
      pro = require("./process"),
      slice = jsp.slice,
      member = jsp.member,
      PRECEDENCE = jsp.PRECEDENCE,
      OPERATORS = jsp.OPERATORS;
  
  function ast_squeeze_more(ast) {
          var w = pro.ast_walker(), walk = w.walk;
          return w.with_walkers({
                  "call": function(expr, args) {
                          if (expr[0] == "dot" && expr[2] == "toString" && args.length == 0) {
                                  // foo.toString()  ==>  foo+""
                                  return [ "binary", "+", expr[1], [ "string", "" ]];
                          }
                  }
          }, function() {
                  return walk(ast);
          });
  };
  
  exports.ast_squeeze_more = ast_squeeze_more;