Update irbuild-str.test

Author: BobTheBuidler

mypyc/test-data/irbuild-str.test

@@ -745,9 +745,12 @@ L3:
 from typing import Final
 
 constant: Final = "constant"
+tuple_of_literals = "tuple", "of", "literals"
 
 def fold_tuple() -> str:
     return " ".join((constant, "folded"))
+def fold_tuple_var() -> str
+    return " ".join(tuple_of_literals)
 def fold_list() -> str:
     return " ".join([constant, "folded"])
 [out]
@@ -756,6 +759,11 @@ def fold_tuple():
 L0:
     r0 = 'constant folded'
     return r0
+def fold_tuple_var():
+    r0 :: str
+L0:
+    r0 = 'tuple of literals'
+    return r0
 def fold_list():
     r0 :: str
 L0: