style

artiq/test/lit/embedding/error_attr_constant.py

@@ -5,7 +5,7 @@ from artiq.language.core import *
 from artiq.language.types import *
 
 class c:
-    kernel_invariants = {'a'}
+    kernel_invariants = {"a"}
 
     def __init__(self):
         self.a = 1

artiq/test/lit/embedding/warning_invariant_2.py

@@ -12,8 +12,8 @@ class c:
     def __repr__(self):
         return "<testbench.c object>"
 
-i1 = c({'a', 'b'})
-i2 = c({'a'})
+i1 = c({"a", "b"})
+i2 = c({"a"})
 
 @kernel
 def entrypoint():