[Merged by Bors] - chore(Analysis/InnerProductSpace/Rayleigh): clean up and fix a non-terminal simp

[yuanyi-350]

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[github-actions]

PR summary cc0ebd15d3

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

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Declarations diff

+ rayleighQuotient_add

You can run this locally as follows

## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.

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Decrease in tech debt: (relative, absolute) = (1.00, 0.01)

Current number	Change	Type
144	-1	flexible linter exceptions

Current commit f09671efdb
Reference commit cc0ebd15d3

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

[github-actions]

✅ PR Title Formatted Correctly

The title of this PR has been updated to match our commit style conventions.
Thank you!

[grunweg]

Thanks! Let's have a second opinion; if I hear no dissent in 24 hours, I'll merge this.
maintainer merge?

[github-actions]

🚀 Pull request has been placed on the maintainer queue by grunweg.

[riccardobrasca]

Thanks!

bors merge

[mathlib-bors]

Pull request successfully merged into master.

Build succeeded:

• Build
• Lint style
• Post-Build Step