[devtechedge]

Summary

indent(..., first=True) was always prefixing the indent width, even when the first line was empty and blank was left at its default False. That made empty input (and an empty first line) render as spaces instead of staying empty.

Example from #2176:

Environment().from_string("{% filter indent(4, first=True) %}{% endfilter %}").render()
# was "    ", now ""

first=True still indents a non-empty first line. With blank=True, an empty first line is still indented.

Changes

• Only prepend indent when first=True if blank=True or the first line is non-empty
• Regression coverage for empty filter body, empty string, and multiline empty-first-line cases
• CHANGES.rst + versionchanged note for 3.2

fixes #2176

Test plan

• pytest tests/test_filters.py -k indent (4 passed)
• full tests/test_filters.py (133 passed)

[davidism]

https://palletsprojects.com/contributing/llm-ai