chore: Rename Xor' to Xor

[JadAbouHawili]

Rename Xor' to Xor per the comment which recommended doing so after v4.25.0-rc1

Moves:

• Xor' --> Xor

#new members > Why Xor' and not Xor? Why `Or` and not `OrOp` for `Prop`? @ 💬

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[github-actions]

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[JadAbouHawili]

relevant zulip thread: here

[github-actions]

PR summary 2e1ad590c1

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

+ Xor
+ Xor.or
+ dense_xor_cyclic
+ exists_isOpen_xor_mem
+ instance : Std.Commutative Xor := ⟨xor_comm⟩
+ instance [Decidable a] [Decidable b] : Decidable (Xor a b) := inferInstanceAs (Decidable (Or ..))
+ symmDiff_eq_Xor
+ symmDiff_eq_xor
+ t0Space_iff_exists_isOpen_xor_mem
+-+ even_xor_odd
+-+ even_xor_odd'
- Xor'.or
- instance : Std.Commutative Xor' := ⟨xor_comm⟩
- instance [Decidable a] [Decidable b] : Decidable (Xor' a b) := inferInstanceAs (Decidable (Or ..))
- symmDiff_eq_Xor'

You can run this locally as follows

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

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

The doc-module for scripts/pr_summary/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
167	-1	adaptation notes

Current commit a05ee23873
Reference commit 2e1ad590c1

You can run this locally as

./scripts/reporting/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).

[JadAbouHawili]

-awaiting-author

[mathlib-merge-conflicts]

This pull request has conflicts, please merge master and resolve them.