Fixing a broken link.

llvm-svn: 168372
diff --git a/llvm/docs/BitCodeFormat.rst b/llvm/docs/BitCodeFormat.rst
index bd26f7b..69a815f 100644
--- a/llvm/docs/BitCodeFormat.rst
+++ b/llvm/docs/BitCodeFormat.rst
@@ -54,9 +54,9 @@
 
 * Abbreviations, which specify compression optimizations for the file.
 
-Note that the `llvm-bcanalyzer <CommandGuide/html/llvm-bcanalyzer.html>`_ tool
-can be used to dump and inspect arbitrary bitstreams, which is very useful for
-understanding the encoding.
+Note that the :doc:`llvm-bcanalyzer <CommandGuide/llvm-bcanalyzer>`
+tool can be used to dump and inspect arbitrary bitstreams, which is very useful
+for understanding the encoding.
 
 .. _magic number: