Why is < Escaped but > Remains Unescaped in Templates?

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Escaping of < but Not > in Templates

In the realm of file generation through templates, a perplexing issue has emerged: the unescaped > character, while its counterpart < undergoes an inexplicable transformation into <. To unravel this mystery, we delve into the documentation.

html/template's automatic escaping mechanism, intended for HTML output, treats data values as plaintext that requires encoding for safe embedding. However, the rules of escaping are context-sensitive. In the given template, where the < character appears within a #include directive, this escaping mechanism wrongly interprets it as HTML content and transforms it to <.

The solution lies in aligning the template's purpose with the appropriate template engine:

• If the output is HTML, use html/template, which provides context-sensitive escaping.
• For non-HTML output, opt for text/template, which avoids unnecessary escaping, ensuring that < and > are preserved in their original form.

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