Rendering issue with katex

[james-chf]

Some code blocks may not render properly e.g. in ethereum-bridge.md this block

/eth_block/$block_hash/header : Vec<u8>
/eth_block/$block_hash/messages : Vec<Vec<u8>>
/eth_block/$block_hash/seen_by : Vec<Address>
/eth_block/$block_hash/voting_power: u64
/eth_block/$block_hash/seen: bool
/eth_block/$block_hash/? : [u8; 32]
# not yet decided
/eth_block/$block_hash/merkle_proofs : Vec<Vec<u8>>

is rendered with the $ replaced by HTML tags (https://specs.anoma.net/master/architecture/interoperability/ethereum-bridge.html)