test_input.txt

This is a very long line that should be wrapped at the specified width to make it more readable and easier to work with in various text editors and terminals.

    This is an indented paragraph that contains a lot of text. It should maintain its indentation when wrapped to preserve the document structure and formatting.

Short line.

Averylongwordthathasnospacesandneedstobeforciblybrokenintomultiplelinestofitwithinthespecifiedwidth.

日本語のテキストも正しく折り返されることを確認します。これは長い日本語の文章で、指定された幅で適切に折り返される必要があります。