Change GHC_OPTIONS to OPTIONS_GHC

compiler/main/DriverPipeline.hs

@@ -491,7 +491,7 @@ data PipelineOutput
 -- at which stage to stop.
 --
 -- The DynFlags can be modified by phases in the pipeline (eg. by
--- GHC_OPTIONS pragmas), and the changes affect later phases in the
+-- OPTIONS_GHC pragmas), and the changes affect later phases in the
 -- pipeline.
 runPipeline
   :: GhcMonad m =>

docs/users_guide/6.6-notes.xml

@@ -132,7 +132,7 @@
             The following flags (and, where appropriate, their inverses)
             used to be static (can only be given on
             the command line) but are now dynamic (can also be given in
-            a <literal>GHC_OPTIONS</literal> pragma or with
+            an <literal>OPTIONS_GHC</literal> pragma or with
             <literal>:set</literal> in GHCi):
             <option>-c</option>,
             <option>-hcsuf</option>,