Thank for the tool.
I edited some style to add the bracket above.
However, we need to agree that it's still not perfect, hope you can to make it like real
Ref:
https://jsfiddle.net/fgnp07ty/1/
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Line 99-100: can use ruby or span data-tooltip
Line 117-119: add "--extra-css ./ruby.css" while converting
code.zip