Documentation cleanup: escape # characters in Doxygen comments as needed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158969 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Lex/DirectoryLookup.h b/include/clang/Lex/DirectoryLookup.h
index 95f0d27..0976da3 100644
--- a/include/clang/Lex/DirectoryLookup.h
+++ b/include/clang/Lex/DirectoryLookup.h
@@ -25,7 +25,7 @@
 class Module;
   
 /// DirectoryLookup - This class represents one entry in the search list that
-/// specifies the search order for directories in #include directives.  It
+/// specifies the search order for directories in \#include directives.  It
 /// represents either a directory, a framework, or a headermap.
 ///
 class DirectoryLookup {