Put 'if let' back into comment.

clippy_lints/src/formatting.rs

@@ -245,7 +245,7 @@ fn is_block(expr: &ast::Expr) -> bool {
     }
 }
 
-/// Match `if` expressions and return the `then` and `else` block.
+/// Match `if` or `if let` expressions and return the `then` and `else` block.
 fn unsugar_if(expr: &ast::Expr) -> Option<(&P<ast::Block>, &Option<P<ast::Expr>>)> {
     match expr.node {
         ast::ExprKind::If(_, ref then, ref else_) => Some((then, else_)),