anchor.diff:              return false;
           }
       };
  -    
  +
       function switchTo(el) {
           if(previousFrameInfo) previousFrameInfo.style.display = "none";
           previousFrameInfo = el;
  
positive.code:             }
          };
      }
      
      function escapeHTML(html) {
          return html.replace(/&/, "&amp;").replace(/</g, "&lt;");
      }
      
      function REPL(index) {
          this.index = index;
          
          var previousCommands = JSON.parse(localStorage.getItem("better_errors_previous_commands"));
          if(previousCommands === null) {
            localStorage.setItem("better_errors_previous_commands", JSON.stringify([]));
  
negative.code:         }
          return false;
      };
  
      // If there are no application frames, select the 'All Frames'
      // tab by default.
      if(applicationFramesCount > 0) {
  