Does it assume certain terminal or shell?
Here's how the code shows when I open it using less:
16 # Examples:
17 #
18 # spark 1 5 22 13 53
19 # # => <E2><96><81><E2><96><81><E2><96><83><E2><96><82><E2><96><87>
> ./spark 1 5 22
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I'm using Putty (default options) and bash.