fixes bug, some unescaped ampersands were reaching the xml parser.

Author: drhodes

src/auxml/macro.py

@@ -87,7 +87,7 @@ def replace_attrs(self, mcall, mac):
         # do this.
 
         try:
-            tree = etree.fromstring("<temp>" + s + "</temp>")
+            tree = parser.parse_string("<temp>" + s + "</temp>")
             return tree.getchildren()[0]
         except Exception as e:
             print(s)

src/auxml/parser.py

@@ -33,7 +33,12 @@ def parse_html_file(fname):
 
     # mutate soup in place
     tag_els_with_info(soup, fname)
-    
+
+    escaped_html = str(soup)
+    tree = etree.fromstring(escaped_html, _xml_parser)
+    return tree
+
+def parse_string(s):
+    soup = BeautifulSoup(s, "html.parser")
     tree = etree.fromstring(str(soup), _xml_parser)
     return tree
-