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diff --git a/macros/latex/contrib/physics2/tex/phy-ab.braket.sty b/macros/latex/contrib/physics2/tex/phy-ab.braket.sty
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-%%
-%% This is file `phy-ab.braket.sty',
-%% the `ab.braket' module of `physics2' package.
-%%
-%% ******************************************************
-%% * This work may be distributed and/or modified under *
-%% * the conditions of the LaTeX Project Public License *
-%% * *
-%% * http://www.latex-project.org/lppl.txt *
-%% * *
-%% * either version 1.3c of this license or any later *
-%% * version. *
-%% ******************************************************
-%%
-%% This work has the LPPL maintenance status `maintained'.
-%%
-%% The Current Maintainer of this work is Zhang Tingxuan.
-%%
-\ProvidesFile{phy-ab.braket.sty}
- [2023/04/02 `ab.braket' module of `physics2.sty']
-% This module requires \phy@abopen and \phy@abclose from `ab'.
-\phy@requiremodule{ab}
-\ifdefined\phy@bra@@
- \PackageWarning{physics2}{You cannot load `ab.braket' and `braket'
- modules together.\MessageBreak Only `ab.braket' module works now.}
-\fi
-% \bra<foo|
-\phy@AB@gen{br.m}<{mr<|}{\mathopen#1\langle#2\mathclose#1\vert\endgroup}
-\phy@AB@gen{br.a}<{r<|}{\phy@abopen\langle#1\phy@abclose\vert}
-\phy@d@l@genxm{br.m}
-\phy@d@l@genxa{br.a}
-\DeclareRobustCommand\bra{\phy@d@lx{br.m}{br.a}}
-% \ket|foo>
-\phy@AB@gen{kt.m}|{mr|>}{\mathopen#1\vert#2\mathclose#1\rangle\endgroup}
-\phy@AB@gen{kt.a}|{r|>}{\phy@abopen\vert#1\phy@abclose\rangle}
-\phy@d@l@genxm{kt.m}
-\phy@d@l@genxa{kt.a}
-\DeclareRobustCommand\ket{\phy@d@lx{kt.m}{kt.a}}
-% \braket<foo|bar>
-\begingroup
-\catcode`\|=\active
-\gdef\phy@@mb@bk#1#2{\begingroup
- \mathcode`\|="8000\def|{\egroup#1\vert\bgroup}%
- \def\<{\mathrel{<}}\def\>{\mathrel{>}}%
- \mathopen#1\langle\bgroup#2\egroup\mathclose#1\rangle\endgroup}
-\gdef\phy@@ab@bk#1{\begingroup
- \mathcode`\|="8000\def|{\egroup\phy@abb@bkv\bgroup}%
- \def\<{\mathrel{<}}\def\>{\mathrel{>}}%
- \phy@abopen\langle\bgroup#1\egroup\phy@abclose\rangle\endgroup}
-\endgroup
-\def\phy@abb@bkv{\middle\vert}
-\phy@AB@gen{bk.m}<{mr<>}{\phy@@mb@bk#1{#2}\endgroup}
-\phy@AB@gen{bk.a}<{r<>}{\phy@@ab@bk{#1}}
-\phy@d@l@genxm{bk.m}
-\phy@d@l@genxa{bk.a}
-\DeclareRobustCommand\braket{\phy@d@lx{bk.m}{bk.a}}
-% \ketbra|foo>bar<baz|
-\begingroup
-\catcode`\<=\active
-\catcode`\>=\active
-\gdef\phy@@mb@kb#1#2{\begingroup
- \mathcode`\<="8000 \mathcode`\>="8000%
- \def<{#1\langle}\def>{#1\rangle}%
- \def\<{\phy@abb@l}\def\>{\phy@abb@r}%
- \mathopen#1\vert#2\mathclose#1\vert\endgroup}
-\endgroup
-\gdef\phy@@ab@kb#1>#2<#3\phy@@end{\begingroup
- \def\<{\phy@abb@l}\def\>{\phy@abb@r}%
- \phy@abopen\vert\mathopen{\phy@mathvphantom{#3}}#1\phy@abclose\rangle#2%
- \phy@abopen\langle#3\mathclose{\phy@mathvphantom{#1}}\phy@abclose\vert
-\endgroup}
-\AtBeginDocument{\ifcsname symbf\endcsname
- \def\phy@abb@l{\Umathchar 3 \symoperators "003C }%
- \def\phy@abb@r{\Umathchar 3 \symoperators "003E }%
-\fi}
-\def\phy@abb@l{\mathchar"313C }
-\def\phy@abb@r{\mathchar"313E }
-\phy@AB@gen{kb.m}|{mr||}{\phy@@mb@kb#1{#2}\endgroup}
-\phy@AB@gen{kb.a}|{r||}{\phy@@ab@kb#1\phy@@end}
-\phy@d@l@genxm{kb.m}
-\phy@d@l@genxa{kb.a}
-\DeclareRobustCommand\ketbra{\phy@d@lx{kb.m}{kb.a}}
-\endinput
-%% End of file `phy-ab.braket.sty'.