Review from Robert, and nits

@@ -142,13 +142,13 @@
 appears in the argument list (that is, linking is attempted), the shadow
 compilers will not be invoked.
 This is because the objects built with that compiler which would be linked
 have been previously discarded.
 .It
-If an option of the form
+If the
 .Fl o Ar filename
-was provided, it will be replaced by two options of the form
+option was provided, with or without a separating space, it will be replaced with
 .Fl o Ar tempfile
 .It
 If the option
 .Fl o
 was not provided,