Use specified indent token with codeblock

[jahvon]

Specifying an indent token in the code block style currently has no impact. This change incorporates the specified token when rendering code blocks.

[caarlos0]

thanks!

[bashbunni]

Hey sorry, we ended up removing this from the master branch as it was demonstrating some buggy behaviour where it would print the token twice. I do still think this would be a great feature to include in Glamour, we just need to get it ironed out more :)

Here's how to reproduce this bug:

• Change DarkStyle in styles.go to include IndentToken: stringPtr("| "), in the codeblock
• Either switch the dep of glow to use that version of glamour or use the stdin-stdout example that meowgorithm added and do cat ../../README.md | go run . from that example's dir
  

[jahvon]

@bashbunni I think I identified that the problem here is this line https://github.com/charmbracelet/glamour/pull/299/files#diff-96fb8876f058be101f28d9c59be65222e96af85b60b4f9aaf90080ef16b756f7R125

The default margin in that style is set to 2. When I change the margin value for the code block style to 1 or replace margin with Indent: unintptr(1) I no longer see the duplicated tokens. I can reopen this with a fix for this but just want to verify that it's safe to remove the addition of the margin when rendering the indent token. Ideally, just the ident sizing is used (with maybe a default of 1?)

[bashbunni]

@jahvon It would be great if you would be willing to re-open with a fix. I do think this would be a great feature to have in glamour