fix: _nolinebreak rendering

Author: clatapie

src/pyconverter/xml2py/ast_tree.py

@@ -54,6 +54,7 @@
     "Caret 40?": "",
     '``"``': "``",
     "/_nolinebreak?": "",
+    "_nolinebreak ?": "",
     "_nolinebreak?": "",
     "nbsp": " ",
 }