contentcollector: backed out changeset 3292429ab3

That commit (merged recently with PR #3622) was part of an effort to fix #3620,
but introduced a very bad bug that broke the cursor behaviour when pressing
space, making the program unusable.

This commit completes the revert of PR #3622 and fixes #3728.

--HG--
branch : revert-3622

src/static/js/contentcollector.js

@@ -406,13 +406,12 @@ function makeContentCollector(collectStyles, abrowser, apool, domInterface, clas
         cc: this,
         state: state,
         tname: tname,
-        node: node,
-        text: txt,
+        node:node,
+        text:txt,
         styl: null,
         cls: null
       });
-      var txt = (typeof(txtFromHook)=='object' && txtFromHook.length==0)
-        ? dom.nodeValue(node).trim() : txtFromHook[0].trim();
+      var txt = (typeof(txtFromHook)=='object'&&txtFromHook.length==0)?dom.nodeValue(node):txtFromHook[0];
 
       var rest = '';
       var x = 0; // offset into original text