Python: adjust test expectations

note that we do retain precision in
`test_dict_from_keyword()`

Author: yoff

python/ql/lib/semmle/python/frameworks/Stdlib.qll

@@ -4271,7 +4271,7 @@ module StdlibPrivate {
         preservesValue = true
       )
       or
-      // Imprecise content in any argument ends up on the container itself.
+      // Imprecise content in the first argument ends up on the container itself.
       input = "Argument[0]" and
       output = "ReturnValue" and
       preservesValue = false

python/ql/test/library-tests/dataflow/coverage/test_builtins.py

@@ -145,10 +145,10 @@ def test_dict_from_dict():
 @expects(4)
 def test_dict_from_multiple_args():
     d = dict([("k", SOURCE), ("k1", NONSOURCE)], k2 = SOURCE, k3 = NONSOURCE)
-    SINK(d["k"]) #$ MISSING: flow="SOURCE, l:-1 -> d['k']"
-    SINK_F(d["k1"])
+    SINK(d["k"]) #$ flow="SOURCE, l:-1 -> d['k']"
+    SINK_F(d["k1"]) #$ SPURIOUS: flow="SOURCE, l:-2 -> d['k1']" // due to imprecise list content
     SINK(d["k2"]) #$ flow="SOURCE, l:-3 -> d['k2']"
-    SINK_F(d["k3"])
+    SINK_F(d["k3"]) #$ SPURIOUS: flow="SOURCE, l:-4 -> d['k3']" // due to imprecise list content
 
 ## Container methods