From cc5acf87c7568e30cf4322d848d0ca35f1a624ed Mon Sep 17 00:00:00 2001
From: Matthew Woodcraft <matthew@woodcraft.me.uk>
Date: Thu, 6 Jan 2022 21:53:37 +0000
Subject: [PATCH] Improve the documentation of macros-by-example metavariable
 names

Metavariable names are not necessarily identifiers: they may also be
keywords:(other than `crate`), raw identifiers or `_`.
---
 src/macros-by-example.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/macros-by-example.md b/src/macros-by-example.md
index 7d2b44709..e731091ca 100644
--- a/src/macros-by-example.md
+++ b/src/macros-by-example.md
@@ -23,7 +23,7 @@
 > _MacroMatch_ :\
 > &nbsp;&nbsp; &nbsp;&nbsp; [_Token_]<sub>_except $ and delimiters_</sub>\
 > &nbsp;&nbsp; | _MacroMatcher_\
-> &nbsp;&nbsp; | `$` [IDENTIFIER] `:` _MacroFragSpec_\
+> &nbsp;&nbsp; | `$` ( [IDENTIFIER_OR_KEYWORD] <sub>_except `crate`_</sub> | [RAW_IDENTIFIER] | `_` ) `:` _MacroFragSpec_\
 > &nbsp;&nbsp; | `$` `(` _MacroMatch_<sup>+</sup> `)` _MacroRepSep_<sup>?</sup> _MacroRepOp_
 >
 > _MacroFragSpec_ :\
@@ -479,6 +479,7 @@ For more detail, see the [formal specification].
 [Hygiene]: #hygiene
 [IDENTIFIER]: identifiers.md
 [IDENTIFIER_OR_KEYWORD]: identifiers.md
+[RAW_IDENTIFIER]: identifiers.md
 [LIFETIME_TOKEN]: tokens.md#lifetimes-and-loop-labels
 [Metavariables]: #metavariables
 [Repetitions]: #repetitions