Back up to 100% coverage.

misc.c

@@ -394,9 +394,10 @@ static bool is_valid_int(const char *str)
     if (*str == '-')
         ++str;
 
-    // Handle empty string or just "-"
+    // Handle empty string or just "-". Should never reach this 
+    // point, because this is only used with transitive verbs.
     if (!*str)
-        return false;
+        return false; // LCOV_EXCL_LINE
 
     // Check for non-digit chars in the rest of the stirng.
     while (*str)

tests/illformed.chk

@@ -659,16 +659,29 @@ You're outside grate.
 
 The grate is locked.
 
-> quit
+> seed -123
 
-Do you really want to quit now?
+Seed set to 4294967173
 
-> yes
+You're outside grate.
+
+The grate is locked.
+
+> no
 
 OK
 
-You scored 27 out of a possible 430, using 125 turns.
+Are you trying to get into the cave?
 
-You are obviously a rank amateur.  Better luck next time.
+> quit
+
+Please answer the question.
+
+Are you trying to get into the cave?
+
+> yes
+
+I am prepared to give you a hint, but it will cost you 2 points.
+
+Do you want the hint?
 
-To achieve the next higher rating, you need 19 more points.

tests/illformed.log

@@ -133,5 +133,7 @@ s
 down
 s
 in
+seed -123
+no
 quit
 yes