This ensures that very small numbers (e.g., 1e-200) are formatted as 0.000... instead of using scientific notation.

Trac ticket number

ticket-30363

Branch description

This PR fixes an issue in django/utils/numberformat.py where very small decimals were displayed in exponential notation when a decimal_pos argument was supplied. With the proposed change, such numbers are correctly formatted as 0.00... with the specified precision.

Example:

• Before: nformat(Decimal('1e-200'), '.', decimal_pos=2) -> 1.00e-200
• After: nformat(Decimal('1e-200'), '.', decimal_pos=2) -> 0.00

The change introduces a cutoff mechanism that checks whether the number is too small to be represented with the provided decimal positions, and formats it as 0.00... accordingly.

Checklist

• This PR targets the main branch.
• The commit message is written in past tense, mentions the ticket number, and ends with a period.
• I have checked the "Has patch" ticket flag in the Trac system.
• I have added or updated relevant tests.
• I have added or updated relevant docs, including release notes if applicable.
• I have attached screenshots in both light and dark modes for any UI changes.