Revert "Revert most of "9899 cw(1onbld) should shadow more compilation""
This reverts commit 67deef8cbc83060db238a0f4ee252d1ba74641ef.

@@ -135,15 +135,14 @@
 .Nm cw
 will invoke each shadow compiler, with the outputs modified (as well as any
 translation for compiler style) as follows:
 .Bl -enum
 .It
-If neither of
-.Fl c ,
-.Fl 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.
+If
+.Nm cw
+is invoked to link-edit without compilation (the input files are all objects),
+the shadow compiler is not invoked.
 .It
 If the
 .Fl o Ar filename
 option was provided, with or without a separating space, it will be replaced with
 .Fl o Ar tempfile