Fix some bugs.

common/content/browser.js

@@ -127,7 +127,7 @@ const Browser = Module("browser", {
             "Go to the root of the website",
             function () { Browser.climbUrlPath(-1); });
 
-        mappings.add([modes.NORMAL], ["<C-l>"],
+        mappings.add(modes.all, ["<C-l>"],
             "Redraw the screen",
             function () { ex.redraw(); });
     },

common/content/commandline.js

@@ -659,6 +659,9 @@ const CommandLine = Module("commandline", {
      *          the MOW.
      */
     echo: function echo(str, highlightGroup, flags) {
+        if (String(str) == "undefined")
+            util.dumpStack();
+
         // dactyl.echo uses different order of flags as it omits the highlight group, change commandline.echo argument order? --mst
         if (this._silent)
             return;

common/content/events.js

@@ -1122,7 +1122,7 @@ const Events = Module("events", {
                         return true;
 
                     let ret = execute(map, null, this.count);
-                    return map.route && ret;
+                    return !(map.route && ret);
                 }
             }
             else if (mappings.getCandidates(this.main, candidateCommand).length > 0 && !event.skipmap) {

common/modules/util.jsm

@@ -31,6 +31,7 @@ memoize(this, "Commands", function () {
 const FailedAssertion = Class("FailedAssertion", Error, {
     init: function (message) {
         update(this, Error(message))
+        this.message = message;
     }
 });