Merge rust-analyzer/ungrammar#43

43: Make `LetElse` its own node r=jonas-schievink a=jonas-schievink

bors r+

Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>

Author: bors[bot]

src/tools/rust-analyzer/lib/ungrammar/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "ungrammar"
 description = "A DSL for describing concrete syntax trees"
-version = "1.14.7"
+version = "1.14.8"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/matklad/ungrammar"
 edition = "2018"

src/tools/rust-analyzer/lib/ungrammar/rust.ungram

@@ -316,9 +316,12 @@ Stmt =
 LetStmt =
   Attr* 'let' Pat (':' Type)?
   '=' initializer:Expr
-  ('else' else_branch:BlockExpr)?
+  LetElse?
   ';'
 
+LetElse =
+  'else' BlockExpr
+
 ExprStmt =
   Expr ';'?