Unison, the programming language, uses a unique approach to version control where the code itself is immutable, and changes are tracked through a graph of edits rather than traditional file revisions.
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LiveScript, the predecessor to JavaScript, used indentation instead of curly braces to define code blocks, a feature later adopted by Python.
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Swift's error handling uses a `do-catch` structure similar to other languages, but crucially, errors are *values* that can be explicitly thrown and handled, rather than exceptions abruptly interrupting execution.
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