Documentation: improve formatting


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177066 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/AddressSanitizer.rst b/docs/AddressSanitizer.rst
index 57cb4fe..89e8644 100644
--- a/docs/AddressSanitizer.rst
+++ b/docs/AddressSanitizer.rst
@@ -117,15 +117,15 @@
 ``__has_feature(address_sanitizer)``. Note: currently, this attribute will be
 lost if the function is inlined.
 
-``Initialization order checking``
----------------------------------
+Initialization order checking
+-----------------------------
 
 AddressSanitizer can optionally detect dynamic initialization order problems,
 when initialization of globals defined in one translation unit uses
 globals defined in another translation unit. To enable this check at runtime,
 you should set environment variable
 ``ASAN_OPTIONS=check_initialization_order=1``.
-    
+
 Supported Platforms
 ===================