Align upgrade summary columns

[paulogdm]

Hello team,

Small QoL update, as I was running brew upgrade and it was difficult to scan through all the packages without a more human friendly formatting. This change aligns package names and installed versions using calculated column widths (✅ formula, ✅ casks, and ✅ combined upgrade summaries -- single-package output is unchanged):

Before:

    deno 2.7.10 -> 2.7.11
    codex 0.117.0 -> 0.118.0

After:

    deno   2.7.10  -> 2.7.11
    codex  0.117.0 -> 0.118.0

Open Questions

• Would this change cause other lists in the program to look 'different', which may be undesired? If the answer is yes, feel free to close.

• Have you followed our Contributing guidelines?
• Have you checked for other open Pull Requests for the same change?
• Have you explained what your changes do? Performance claims (e.g. "this is faster") must include Hyperfine benchmarks.
• Have you explained why you'd like these changes included, not just what they do?
• For bug fixes, have you given step-by-step brew commands to reproduce the bug?
• A: Not a bug fix, but you can reproduce this improvement by having several outdated packages and then brew upgrade --dry-run.
• Have you written new tests (excluding integration tests)? Here's an example.
• Have you successfully run brew lgtm (style, typechecking and tests) locally?

---

• AI was used to generate or assist with generating this PR.

A: 🤖 Used Codex with GPT 5.5.

[Copilot]

Pull request overview

This PR improves the readability of brew upgrade output by aligning the “name” and “installed version” columns across multi-item upgrade summaries, making the list easier to scan.

Changes:

• Added Cask::Upgrade.format_upgrade_summary to column-align upgrade summary lines for multi-item lists.
• Applied the formatter to cask upgrade summaries and the final combined upgrade summary.
• Updated/added RSpec expectations to cover the new aligned output.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 1 comment.

File	Description
Library/Homebrew/cmd/upgrade.rb	Formats the final upgrade summary using the new aligned formatter.
Library/Homebrew/cask/upgrade.rb	Implements aligned formatting and uses it when printing cask upgrade summaries.
Library/Homebrew/test/cmd/upgrade_spec.rb	Updates expected brew upgrade output spacing for aligned columns.
Library/Homebrew/test/cask/upgrade_spec.rb	Adds unit coverage for the new formatter across mixed upgrade line shapes.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[MikeMcQuaid]

Good idea! Some code cleanup and this should be good to go.

[MikeMcQuaid]

Don't think this warrants a new module: just put it as a new method in Library/Homebrew/upgrade.rb

[paulogdm]

Roger that. Will patch tonight.

[paulogdm]

Will do a small cleanup and some patching tonight, and then mark as "ready for review".