Fix prefix wrapping again

nowrap is not enough because it still breaks on hyphens sometimes. But
since we're using pre now, we need to make sure no whitespace/newline is
around each <span> because they will be outputted.

css/glowingbear.css

@@ -53,7 +53,7 @@ td.prefix {
     text-align: right;
     vertical-align: top;
     padding-right: 5px;
-    white-space: nowrap;
+    white-space: pre;
 }
 td.message {
     word-wrap: break-word;

index.html

@@ -191,9 +191,7 @@
                   {{ bufferline.date | date:'HH:mm' }}
                 </span>
               </td>
-              <td class="prefix vertical-line">
-                <span ng-repeat="part in bufferline.prefix" class="text" style="{{ part.fg }}">{{ part.text }}</span>
-              </td>
+              <td class="prefix vertical-line"><span ng-repeat="part in bufferline.prefix" style="{{ part.fg }}">{{ part.text }}</span></td>
               <td class="message">
                 <span ng-repeat="part in bufferline.content" class="text" style="{{ part.fg }}" ng-bind-html="part.text"></span>