Fix code block formatting

[hramezani]

Fixes #88

Output after this patch

[Kludex]

I did what I did, so there was less text on the snippet.

Should we highlight the lines? https://squidfunk.github.io/mkdocs-material/reference/code-blocks/#highlighting-specific-lines

In any case, I'm fine with this.

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (1cf2073) 97.42% compared to head (41f72f8) 97.42%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #89   +/-   ##
=======================================
  Coverage   97.42%   97.42%           
=======================================
  Files           5        5           
  Lines         311      311           
  Branches       68       68           
=======================================
  Hits          303      303           
  Misses          6        6           
  Partials        2        2           

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[hramezani]

Thanks @Kludex for your suggestion.

Highlight added to some lines.