Somewhat better Y and :yank copy behavior that should work as expected on OS-X.

common/content/buffer.js

@@ -481,10 +481,7 @@ const Buffer = Module("buffer", {
             controller.setCaretEnabled(caretmode);
             return String.match(selection, /\w*/)[0];
         }
-        if (util.computedStyle(range.startContainer).whiteSpace == "pre"
-            && util.computedStyle(range.endContainer).whiteSpace == "pre")
-            return String(range);
-        return String(selection);
+        return util.domToString(range);
     },
 
     /**

common/content/commandline.js

@@ -583,9 +583,6 @@ const CommandLine = Module("commandline", {
         this._lastMowOutput = <div class="ex-command-output" style={"white-space: " + style} highlight={highlightGroup}>{str}</div>;
         let output = util.xmlToDom(this._lastMowOutput, doc);
 
-        if (!silent)
-            dactyl.triggerObserver("echoMultiline", str, highlightGroup, output);
-
         // FIXME: need to make sure an open MOW is closed when commands
         //        that don't generate output are executed
         if (this.widgets.mowContainer.collapsed)
@@ -593,6 +590,9 @@ const CommandLine = Module("commandline", {
 
         doc.body.appendChild(output);
 
+        if (!silent)
+            dactyl.triggerObserver("echoMultiline", str, highlightGroup, output);
+
         commandline.updateOutputHeight(true);
 
         if (options["more"] && win.scrollMaxY > 0) {
@@ -1162,11 +1162,9 @@ const CommandLine = Module("commandline", {
         dactyl.registerObserver("echoLine", observe, true);
         dactyl.registerObserver("echoMultiline", observe, true);
         function observe(str, highlight, dom) {
-            if (!observe.done)
-                buffer.push(dom ? util.domToString(dom) : str)
+            buffer.push(dom ? util.domToString(dom) : str)
         }
         dactyl.trapErrors.apply(dactyl, [fn, self].concat(Array.slice(arguments, 2)));
-        observe.done = true;
         return buffer.join("\n");
     }
 }, {