let_chains: reorder Let in 'ident_can_begin_expr' for lexical order.

Author: Centril

src/libsyntax/parse/token.rs

@@ -122,9 +122,9 @@ pub(crate) fn ident_can_begin_expr(ident: ast::Ident, is_raw: bool) -> bool {
         keywords::Continue.name(),
         keywords::False.name(),
         keywords::For.name(),
+        keywords::If.name(),
         // FIXME(53667): Consider whether `Let` can be added here.
         // keywords::Let.name(),
-        keywords::If.name(),
         keywords::Loop.name(),
         keywords::Match.name(),
         keywords::Move.name(),