Add failing test for issue #358
diff --git a/testsuite/E12not.py b/testsuite/E12not.py
index e76ef13..4856f73 100644
--- a/testsuite/E12not.py
+++ b/testsuite/E12not.py
@@ -642,3 +642,6 @@
         # more stuff
     )
 )
+current_temp = "{t}°{d} {i}".format(t=42,
+                                    d=42424242,
+                                    i=323232)