Switching the highlighting from llvm to none in an attempt to appease the build bot (http://lab.llvm.org:8011/builders/llvm-sphinx-docs/builds/11984/steps/docs-llvm-html/logs/stdio).
Switching the highlighting from llvm to none in an attempt to appease the build bot (http://lab.llvm.org:8011/builders/llvm-sphinx-docs/builds/11984/steps/docs-llvm-html/logs/stdio).

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@276531 91177308-0d34-0410-b5e6-96231b3b80d8

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