LaTeX rendering trickiness

[fredrikekre]

Here is a code block that seems to fail the build (Edit: doesn't actually fail the build, just that the output is empty):

```julia
+=  -=  *=  /=  \=  ÷=  %=  ^=  &=  |=  ⊻=  >>>=  >>=  <<=
```

becomes

\begin{minted}[escapeinside=\%\%]{julia}
+=  -=  *=  /=  \=  ÷=  %\%%=  ^=  &=  |=  %\unicodeveebar%=  >>>=  >>=  <<=\end{minted}

and same with julia-repl. No language works though, i.e.

\begin{lstlisting}[escapeinside=\%\%]
+=  -=  *=  /=  \=  ÷=  %\%%=  ^=  &=  |=  %\unicodeveebar%=  >>>=  >>=  <<=\end{lstlisting}

so seems to be something with minted.

[fredrikekre]

Here are all the blocks that fail the pdf build for the Julia manual:

```julia-repl
julia> 127 % Int8
127
```

```julia-repl
julia> for i = 1:10
           if i % 3 != 0
               continue
           end
           println(i)
       end
3
6
9
```

It is still not permitted to be interpolated into Cmds
(i.e. ``echo `$(nothing)` `` will still error without
running anything.)

```julia-repl
julia> @time advection_serial!(q, u);
(irange,jrange,trange) = (1:500,1:500,1:499)
 830.220 milliseconds (216 allocations: 13820 bytes)

julia> @time advection_parallel!(q, u);
   2.495 seconds      (3999 k allocations: 289 MB, 2.09% gc time)

julia> @time advection_shared!(q,u);
        From worker 2:       (irange,jrange,trange) = (1:500,1:125,1:499)
        From worker 4:       (irange,jrange,trange) = (1:500,251:375,1:499)
        From worker 3:       (irange,jrange,trange) = (1:500,126:250,1:499)
        From worker 5:       (irange,jrange,trange) = (1:500,376:500,1:499)
 238.119 milliseconds (2264 allocations: 169 KB)
```

Edit: Actually lots more, but the same problem with escaping %.

[fredrikekre]

Maybe #1066 is the problem?

[fredrikekre]

Also #1166, maybe it just failed silently before?

[mortenpi]

To simplify debugging in the future: running

DOCUMENTER_TEST_EXAMPLES=latex_simple julia --project test/examples/make.jl

on the mp/mwe-1200 branch replicates this I think.