Add ticks.minus_in_math config for math minus in arcsec labels#387
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`_arcsec_labels` emitted an ASCII hyphen (U+002D) for negative tick values. Add a `ticks.minus_in_math` config flag (default false) that, when true, renders negatives with the Unicode/math minus (U+2212, matplotlib's own minus glyph), e.g. −0.″05 instead of -0.″05. Applies to both the suffix and symbol-over-decimal label formats and is the single tick-label chokepoint used by all 2D plot panels. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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What
Adds a
ticks.minus_in_mathconfig flag (defaultfalse) tovisualize/general.yaml. When true,_arcsec_labelsrenders negative tick values with the Unicode/math minus sign (U+2212, matplotlib's own minus glyph) instead of an ASCII hyphen (U+002D), e.g.−0.″05instead of-0.″05.Why
_arcsec_labelsis the single tick-label chokepoint for all 2D plot panels (image-plane viaarray.py/grid.py, source-plane viainversion.py). It emitted an ASCII hyphen for negatives, inconsistent with matplotlib's ownaxes.unicode_minusbehaviour and with astronomy/LaTeX typesetting. This makes the proper math minus available natively (as a config) rather than requiring per-figure custom label helpers.Scope / safety
3.8"and symbol-over-decimal3.″8).Tests
test_autoarray/plot/test_utils.py::test_arcsec_labels_minus_in_mathasserts U+2212 appears (and the ASCII hyphen does not) when the flag is on, for both label formats; existing tests unchanged and green.🤖 Generated with Claude Code