Remove a useless clone in an example

[Luni-4]

Thanks in advance for your review! :)

[codecov-commenter]

Codecov Report

Merging #222 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #222   +/-   ##
=======================================
  Coverage   16.67%   16.67%           
=======================================
  Files          46       46           
  Lines        5840     5840           
  Branches      696      696           
=======================================
  Hits          974      974           
  Misses       4466     4466           
  Partials      400      400           

Impacted Files	Coverage Δ
src/spaces.rs	59.12% <ø> (ø)

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