fix an overzealous test case change in c39271c and another bug in 459669f

Author: rfindler

drracket-test/tests/drracket/syncheck-test.rkt

@@ -579,9 +579,7 @@
         ("lam"              lexically-bound)
         ("))\n  ("          default-color)
         ("require"          imported)
-        (" "                default-color)
-        ("'m"               unused-require)
-        (")\n  "            default-color)
+        (" 'm)\n  "         default-color)
         ("lam"              imported)
         (")\n"              default-color))
       '(((10 16) (20 26) (92 99))

drracket-tool-text-lib/drracket/private/syncheck/traversals.rkt

@@ -529,7 +529,7 @@
                  (match (syntax->datum raw-module-path)
                    [`',m
                     (define we-have-seen-this-sumodule?
-                      (hash-has-key? phase-to-requires (list adjusted-level (cons m mods))))
+                      (hash-has-key? phase-to-requires (list adjusted-level (cons (submodule #f m) mods))))
                     (if we-have-seen-this-sumodule?
                         `(submod "." ,m)
                         `',m)]