use drop-temps { .. } pseudo-notation

DropTemps(...) looks like a function, this looks like wacko special stuff
diff --git a/src/librustc/hir/lowering/expr.rs b/src/librustc/hir/lowering/expr.rs
index ef0bef9..990728f 100644
--- a/src/librustc/hir/lowering/expr.rs
+++ b/src/librustc/hir/lowering/expr.rs
@@ -351,7 +351,7 @@
                 //
                 // ```
                 // 'label: loop {
-                //     match DropTemps($cond) {
+                //     match drop-temps { $cond } {
                 //         true => $body,
                 //         _ => break,
                 //     }