👌 IMPROVE: Make padding the same as admonitions

[najuzilu]

This PR makes the padding of directives the same as admonitions.

[codecov-io]

Codecov Report

Merging #47 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #47   +/-   ##
=======================================
  Coverage   97.89%   97.89%           
=======================================
  Files           5        5           
  Lines         237      237           
=======================================
  Hits          232      232           
  Misses          5        5           

Flag	Coverage Δ
#pytests	97.89% <ø> (ø)

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