Documentation cleanup: escape # in a Doxygen comment.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158554 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/FrontendActions.cpp b/lib/Frontend/FrontendActions.cpp
index 737ee4a..b699ae8 100644
--- a/lib/Frontend/FrontendActions.cpp
+++ b/lib/Frontend/FrontendActions.cpp
@@ -131,7 +131,7 @@
 ///
 /// \param Module The module we're collecting includes from.
 ///
-/// \param Includes Will be augmented with the set of #includes or #imports
+/// \param Includes Will be augmented with the set of \#includes or \#imports
 /// needed to load all of the named headers.
 static void collectModuleHeaderIncludes(const LangOptions &LangOpts,
                                         FileManager &FileMgr,