Further refinement on IO.x methods

Author: lizmat

S32-setting-library/IO.pod

@@ -556,7 +556,7 @@ strikes) and are summarized in the following table:
     O  Path is owned by real uid.                  Bool:D
 
     e  Path exists.                                Bool:D
-    s  Size of the path in bytes.                  Int
+    s  Size of the path in bytes.                  Int:D
     z  Path has zero size (an empty file).         Bool:D
 
     f  Path is a plain file.                       Bool:D
@@ -571,8 +571,8 @@ strikes) and are summarized in the following table:
     g  Path has setgid bit set.                    Bool:D
     k  Path has sticky bit set.                    Bool:D
 
-All methods (except for C<e>) return Nil if a path has been specified that does
-not exist.
+All methods (except for C<e>) return the appropriate type object if a path
+has been specified that does not exist.
 
 =over 4
 X<stattimes>