[Merged by Bors] - refactor(measure_theory/measure/mutually_singular): use ⟂ PERPENDICULAR instead of ⊥ UP TACK #18423
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The previous notation for
measure_theory.measure.mutually_singular
was⊥ₘ
. This changes it to⟂ₘ
, which is semantically a better character.The same change is made for
measure_theory.vector_measure.mutually_singular
, from⊥ᵥ
to⟂ᵥ
.Zulip
leanprover/vscode-lean#328 makes it easier to type this.