Fixed error message

Author: talbring

SU2_PY/SU2/io/config.py

@@ -351,7 +351,8 @@ def read_config(filename):
         while(line[0].endswith('\\') or len(line.split('\\')) > 1):
             tmp_line = input_file.readline()
             tmp_line = tmp_line.strip()
-            assert len(tmp_line.split('=')) <= 1, ('Statement after line continuation parameter in config file %s' % tmp_line)
+            assert len(tmp_line.split('=')) <= 1, ('Statement found after line '
+                                                   'continuation character in config file %s' % tmp_line)
             if (not tmp_line.startswith('%')):
                 line = line.split('\\')[0]
                 line += ' ' + tmp_line