readthedocs theme: renders code block italic with const

[peter1000]

readthedocs theme renders a code block in italic if there is a const

example:

const MDSTYLE = Dict{ASCIIString, ASCIIString}([
  ("header"         , "#"),
  ("objname"        , "###"),
  ("meta"           , "*"),
  ("exported"       , "##"),
  ("internal"       , "##"),
])

save("docs/api/Lexicon.md", Lexicon, MDSTYLE)

Renders like:

[peter1000]

a Test run looks good - Thanks.