Fixed wml parser to read escaped strings

data/tools/wesnoth/wmlparser.py

@@ -502,6 +502,9 @@ class Parser:
         while not self.at_end():
             text += self.read_until('"{')
             if text[-1] == '"':
+				if self.peek_next() == '"':
+					self.read_next()
+				else:
                 	return text[:-1]
             elif text[-1] == '{':
                 text = text[:-1]