Fix: Reference

[localheinz]

This PR

• fixes a reference

[codecov]

Codecov Report

Merging #385 into main will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##                main      #385   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       161       161           
===========================================
  Files             34        34           
  Lines            503       500    -3     
===========================================
- Hits             503       500    -3     

Impacted Files	Coverage Δ	Complexity Δ
src/Format/Indent.php	100.00% <100.00%> (ø)	9.00 <0.00> (ø)

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