[flang][NFC] Fix first line of magic-numbers.h

The first line of flang/include/flang/Runtime/magic-numbers.h
got split into two somehow; join it back up.

Differential Revision: https://reviews.llvm.org/D110965

GitOrigin-RevId: 33c526416058cfd41a57a7ff73103127b319d6d1
diff --git a/include/flang/Runtime/magic-numbers.h b/include/flang/Runtime/magic-numbers.h
index 0f1957b..b2c6acc 100644
--- a/include/flang/Runtime/magic-numbers.h
+++ b/include/flang/Runtime/magic-numbers.h
@@ -1,5 +1,4 @@
-#if 0 /*===-- include/flang/Runtime/magic-numbers.h \
-         -----------------------===*/
+#if 0 /*===-- include/flang/Runtime/magic-numbers.h -----------------------===*/
 /*
  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  * See https://llvm.org/LICENSE.txt for license information.