[Issue 18081] dlangspec.pdf: don't escape dollars in code examples

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18081

--- Comment #4 from Seb <greensunny12 at gmail.com> ---
PR https://github.com/dlang/dlang.org/pull/1994

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