Attempt to fix Sphinx build

llvm-svn: 281697
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 8e68d6a0234b2e6ff058db51d62d5b4189307697
diff --git a/docs/TestingLibcxx.rst b/docs/TestingLibcxx.rst
index e5323a3..d4fe152 100644
--- a/docs/TestingLibcxx.rst
+++ b/docs/TestingLibcxx.rst
@@ -191,13 +191,13 @@
 .. envvar:: LIBCXX_SITE_CONFIG=<path/to/lit.site.cfg>
 
   Specify the site configuration to use when running the tests.
-  Also see :option:`libcxx_site_config`.
+  Also see `libcxx_site_config`.
 
 .. envvar:: LIBCXX_COLOR_DIAGNOSTICS
 
   If ``LIBCXX_COLOR_DIAGNOSTICS`` is defined then the test suite will attempt
   to use color diagnostic outputs from the compiler.
-  Also see :option:`color_diagnostics`.
+  Also see `color_diagnostics`.
 
 Benchmarks
 ==========