9899 cw(1onbld) should shadow more compilation

@@ -62,13 +62,12 @@
 SHADOW COMPILATION
      If --shadow compilers are specified cw will invoke each shadow compiler,
      with the outputs modified (as well as any translation for compiler style)
      as follows:
 
-     1.   If neither of -c, -S appears in the argument list (that is, linking
-          is attempted or only the pre-processor is invoked), the shadow
-          compilers will not be invoked.
+     1.   If cw is invoked to link-edit without compilation (the input files
+          are all objects), the shadow compiler is not invoked.
 
      2.   If the -o filename option was provided, with or without a separating
           space, it will be replaced with -o tempfile
 
      3.   If the option -o was not provided, -o tempfile will be added to the