Add \seq macro for tight R-style colon ranges

[d-morrison]

Summary

Adds a \seq macro so index sets can render a tight, unspaced colon range like 1:n instead of the spaced binary-relation that a bare : produces in math mode.

• macros.qmd: \providecommand{\seq}[2]{#1{:}#2}, placed next to the range macros (\range/\rangef). No comment added — macros.qmd stays a flat, comment-free definition list per CONTRIBUTING.md.
• interpretations.tsv: matching row (required — the macros-table.qmd build fails on any macro lacking an interpretation).

Usage

$i \in \set{\seq{1}{n}}$ renders i ∈ {1:n} with a tight colon.

Testing

The bcs conda R env here lacks knitr/rmarkdown, so a full quarto render can't run locally — CI (preview/publish) covers it. I did validate the exact R parsing logic from macros-table.qmd against the edited files: all 638 macros parse and none are missing an interpretation, and \seq parses to 2 args with its interpretation.

🤖 Generated with Claude Code

[d-morrison]

Working on this — paws off until I'm done.

[Copilot]

Pull request overview

Adds a new LaTeX macro for “tight” colon-style index ranges (e.g., 1:n) and wires it into the macro-reference tooling by providing the required interpretation entry.

Changes:

• Add \seq macro definition adjacent to existing range-related macros in macros.qmd.
• Add the corresponding \seq interpretation row in interpretations.tsv to keep macros-table.qmd rendering valid.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
macros.qmd	Introduces \providecommand{\seq}[2]{#1{:}#2} for tight colon ranges.
interpretations.tsv	Adds the required interpretation row for \seq so the macro table build doesn’t fail.

[d-morrison]

Merged. \seq is now on main; unclaiming.

[github-actions]

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