[media] index.rst: Fix LaTeX error in interactive mode on Sphinx 1.4.x
The Sphinx 1.4.x definition for \DUrole is:
\providecommand*{\DUrole}[2]{%
\ifcsname DUrole#1\endcsname%
\csname DUrole#1\endcsname{#2}%
\else% backwards compatibility: try \docutilsrole#1{#2}
\ifcsname docutilsrole#1\endcsname%
\csname docutilsrole#1\endcsname{#2}%
\else%
#2%
\fi%
\fi%
}
This is broken when it is used inside a \begin{alltt} block.
So, replace it by just "#2", as this won't cause troubles, and
it is one of the fallback methods for it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
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