Fix underscore to be the proper length.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187406 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CommandGuide/FileCheck.rst b/docs/CommandGuide/FileCheck.rst
index d5c8938..6be5fc3 100644
--- a/docs/CommandGuide/FileCheck.rst
+++ b/docs/CommandGuide/FileCheck.rst
@@ -245,7 +245,7 @@
This case will reject input strings where ``BEFORE`` occurs after ``AFTER``.
The "CHECK-LABEL:" directive
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Sometimes in a file containing multiple tests divided into logical blocks, one
or more ``CHECK:`` directives may inadvertently succeed by matching lines in a