[Merged by Bors] - feat(Topology/Separation/NotNormal): generalize to non-separable spaces

[peakpoint]

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[github-actions]

PR summary a637594054

Import changes for modified files

Dependency changes

File	Base Count	Head Count	Change
Mathlib.Topology.Separation.NotNormal	1423	661	-762 (-53.55%)

Import changes for all files

Files	Import difference
Mathlib.Topology.Separation.NotNormal	-762

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Declarations diff

+ mk_lt_continuum
+ mk_lt_two_pow_mk_dense
+ not_normal_of_continuum_le_mk
+ two_pow_mk_le_two_pow_mk_dense
+ two_pow_mk_lt_continuum
- IsClosed.mk_lt_continuum
- IsClosed.not_normal_of_continuum_le_mk

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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No changes to technical debt.

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).

[ocfnash]

Thanks!

One optional suggestion to trim some lemmas.

bors d+

[mathlib-bors]

✌️ peakpoint can now approve this pull request. To approve and merge a pull request, simply reply with bors r+. More detailed instructions are available here.

[peakpoint]

bors r+

[mathlib-bors]

Pull request successfully merged into master.

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