added refactoring tests - non functional

test/refactor/extract.py

@@ -0,0 +1,17 @@
+# --- a
+def test():
+    #? 25 a
+    return test(1, (30 + b, c) + 1)
+
+# +++
+def test():
+    a = (30 + b, c) + 1
+    return test(a)
+
+# --- multiline
+def test():
+    return test(1, (30 + b, c) + 1)
+# +++
+def test():
+    a = (30 + b, c) + 1
+    return test(a)