[spec/grammar] Add note about auto-generation (#3908)

ntrel · web-flow · commit a5b31d574976 · 2024-09-15T00:28:40.000+02:00
diff --git a/spec/grammar.dd b/spec/grammar.dd
@@ -2,6 +2,8 @@ Ddoc
 
 $(SPEC_S Grammar,
 
+    $(NOTE This page is auto-generated, see the other pages for details.)
+
 $(HEADERNAV_TOC)
 
 $(H2 Lexical Syntax)
