trim parsed text and add whitespaces between text fragments

Author: mussbach

src/PhpWord/Shared/Html.php

@@ -397,19 +397,19 @@ private static function parseListItem($node, $element, &$styles, $data)
                 // at least do not silently swallow any formatted text in lists
                 $types = array('#text', 'strong', 'em', 'span');
                 if (in_array($cNode->nodeName, $types)) {
-                    $text .= $cNode->nodeValue;
+                    $text .= ' ' . trim($cNode->nodeValue);
                 }
 
                 //ideally we should be parsing child nodes for any style, for now just take the text
                 if ('' == trim($text) && '' != trim($node->textContent)) {
-                    $text .= trim($node->textContent);
+                    $text .= ' ' . trim($node->textContent);
                 }
             }
             //ideally we should be parsing child nodes for any style, for now just take the text
             if ('' == trim($text) && '' != trim($node->textContent)) {
                 $text = trim($node->textContent);
             }
-            $element->addListItem($text, $data['listdepth'], $styles['font'], $styles['list'], $styles['paragraph']);
+            $element->addListItem(trim($text), $data['listdepth'], $styles['font'], $styles['list'], $styles['paragraph']);
         }
     }