tools, plugins XEP-0071, XEP-0277: remove recently added expandNewLinesToXHTML, just leave it to the convertors

src/tools/xml_tools.py

@@ -1355,15 +1355,6 @@ class ElementParser(object):
         return self.result.firstChildElement()
 
 
-def expandNewLinesToXHTML(text):
-    """Replace two or more "\n" with "\n<br />\n".
-
-    @param text(unicode)
-    @return unicode
-    """
-    return re.sub(r"\n{2,}", "\n<br />\n", text)
-
-
 def decapsulateDomishContent(elt):
     """Return the inner content of a domish.Element.