fixed strong with spaces after or before

test_tomd.py

@@ -34,6 +34,7 @@ string = """
 <b><i>bold italic</i></b>
 <em>em</em>
 <strong>strong</strong>
+<strong> strong   </strong>
 </p>
 
 <hr/>

tomd.py

@@ -75,7 +75,7 @@ INLINE_ELEMENTS = {
     'img_single_no_close': '<img.*?src="(.*?)".*?>',
     'a': '<a.*?href="(.*?)".*?>(.*?)</a>',
     'em': '<em.*?>(.*?)</em>',
-    'strong': '<strong.*?>(.*?)</strong>',
+    'strong': '<strong.*?>(\s*)(.*?)(\s*)</strong>',
     'tbody': '<tbody.*?>((.|\n)*)</tbody>',
 }
 
@@ -166,6 +166,9 @@ class Element:
                 self.construct_table()
             else:
                 wrapper = MARKDOWN.get(tag)
+                if tag == "strong":
+                    self.content = re.sub(pattern, '{}\g<2>{}'.format(wrapper[0], wrapper[1]), self.content)
+                else:
                     self.content = re.sub(pattern, '{}\g<1>{}'.format(wrapper[0], wrapper[1]), self.content)
 
         if self.tag == "e_p" and self.content[-1:] != '\n' and len(self.content) > 2: