Add optional arcsecond double-prime tick labels

[Jammy2211]

Summary

Adds an optional plotting config toggle for arcsecond tick labels that places the arcsecond symbol over the decimal point using the Style Guide double-prime glyph. The default remains off, preserving existing downstream plot labels unless a caller or workspace explicitly opts in.

API Changes

Adds one optional config key, visualize.general.ticks.symbol_over_decimal, defaulting to false.
When enabled, 2D arcsecond tick labels use the double-prime symbol over the decimal point, e.g. 3.″8; when disabled, labels remain unchanged, e.g. 3.8".
See full details below.

Test Plan

• NUMBA_CACHE_DIR=/tmp/numba_cache MPLCONFIGDIR=/tmp/matplotlib python -m pytest test_autoarray/plot/test_utils.py test_autoarray/plot/test_output.py
• NUMBA_CACHE_DIR=/tmp/numba_cache MPLCONFIGDIR=/tmp/matplotlib python -m pytest test_autoarray/ -x

Full API Changes (for automation & release notes)

Added

• visualize.general.ticks.symbol_over_decimal — optional plotting config key, default false, for placing arcsecond symbols over decimal points in 2D plot tick labels.

Changed Behaviour

• _arcsec_labels(...) keeps the existing ASCII trailing-quote output when symbol_over_decimal is false.
• _arcsec_labels(...) emits double-prime arcsecond labels such as 3.″8, -1.″69, and 3″ when symbol_over_decimal is true.

Migration

• Existing users: no change required; the default is unchanged.
• Opt-in users: set conf.instance["visualize"]["general"]["ticks"]["symbol_over_decimal"] = True or provide the equivalent config override.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Adds an opt-in plotting configuration to render arcsecond tick labels using a double-prime glyph placed over the decimal point, while preserving the existing trailing-quote formatting by default. This fits into autoarray.plot’s config-driven plotting utilities used across the PyAuto ecosystem.

Changes:

• Add visualize.general.ticks.symbol_over_decimal config flag (default false) in packaged defaults.
• Extend _arcsec_labels(...) to emit labels like 3.″8 / 3″ when the flag is enabled, otherwise keep 3.8" / 3".
• Add unit tests covering both the default and opt-in formatting paths.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
autoarray/plot/utils.py	Adds a config-backed boolean flag reader and updates _arcsec_labels to support symbol-over-decimal formatting.
autoarray/config/visualize/general.yaml	Introduces the new ticks.symbol_over_decimal default configuration key.
test_autoarray/plot/test_utils.py	Adds tests validating default suffix labels and the opt-in double-prime formatting.