Mathbin -> Mathlib

fix certain import statements

move "by" to end of line

add import to Mathlib.lean

commit 8f68883
Merge: 405cecc eab0a09
Author: Matthew Ballard <matt@mrb.email>
Date:   Mon Feb 20 09:37:07 2023 -0500

    Merge branch 'master' into port/CategoryTheory.Category.Cat

commit 405cecc
Author: Matthew Ballard <matt@mrb.email>
Date:   Sun Feb 19 08:48:18 2023 -0500

    fix errors; lint

commit 25b7383
Author: Matthew Ballard <matt@mrb.email>
Date:   Sun Feb 19 08:11:21 2023 -0500

    remove script

commit dfa581d
Author: Matthew Ballard <matt@mrb.email>
Date:   Sun Feb 19 08:10:44 2023 -0500

    Squashed commit of the following:

    commit 24c70cb
    Merge: 38a89b8 18f8822
    Author: Matthew Ballard <matt@mrb.email>
    Date:   Thu Feb 16 20:20:59 2023 -0500

        Merge remote-tracking branch 'refs/remotes/origin/port/CategoryTheory.DiscreteCategory' into port/CategoryTheory.DiscreteCategory

    commit 38a89b8
    Author: Matthew Ballard <matt@mrb.email>
    Date:   Thu Feb 16 20:20:24 2023 -0500

        lint some more

    commit 18f8822
    Merge: eb14644 68e722a
    Author: Matthew Robert Ballard <100034030+mattrobball@users.noreply.github.com>
    Date:   Thu Feb 16 20:16:53 2023 -0500

        Merge branch 'master' into port/CategoryTheory.DiscreteCategory

    commit eb14644
    Author: Matthew Ballard <matt@mrb.email>
    Date:   Thu Feb 16 20:14:21 2023 -0500

        lint

    commit 8860e0d
    Author: adamtopaz <github@adamtopaz.com>
    Date:   Thu Feb 16 17:33:00 2023 -0700

        get file to build

    commit 2203485
    Author: adamtopaz <github@adamtopaz.com>
    Date:   Tue Feb 14 22:06:54 2023 -0700

        automated fixes

        Mathbin -> Mathlib

        fix certain import statements

        move "by" to end of line

        add import to Mathlib.lean

    commit 10bf4bb
    Author: adamtopaz <github@adamtopaz.com>
    Date:   Tue Feb 14 22:06:54 2023 -0700

        Initial file copy from mathport

    commit 82e2512
    Author: adamtopaz <github@adamtopaz.com>
    Date:   Tue Feb 14 22:06:54 2023 -0700

        feat: port CategoryTheory.DiscreteCategory

commit 64556c5
Author: Matthew Ballard <matt@mrb.email>
Date:   Sun Feb 19 08:08:19 2023 -0500

    automated fixes

    Mathbin -> Mathlib

    fix certain import statements

    move "by" to end of line

    add import to Mathlib.lean

commit e14a0f5
Author: Matthew Ballard <matt@mrb.email>
Date:   Sun Feb 19 08:08:19 2023 -0500

    Initial file copy from mathport

commit 967e14a
Author: Matthew Ballard <matt@mrb.email>
Date:   Sun Feb 19 08:08:19 2023 -0500

    feat: port CategoryTheory.Category.Cat

3rd time = 🧿?