The microtype package

IMPLEMENTATION: Configuration 113\MT@declare@char@inh\MT@inh@do\MT@inh@split3533 \MT@map@clist@c\MT@features{{\MT@declare@char@inh{##1}{#1}{#2}}}%3534 }{%3535 \MT@map@clist@c\MT@inh@feat{{%3536 \KV@@sp@def\@tempa{##1}%3537 \MT@ifempty\@tempa\relax{%3538 \MT@exp@one@n\MT@declare@char@inh3539 {\csname MT@rbba@\@tempa\endcsname}{#1}{#2}%3540 }%3541 }}%3542 }%3543 \MT@end@catcodes3544 }The keys for the optional argument.3545 \MT@map@clist@c\MT@features@long{%3546 \define@key{MT@inh@}{#1}[]{\edef\MT@inh@feat{\MT@inh@feat#1,}}}3547 \define@key{MT@inh@}{inputenc}{\def\MT@extra@inputenc{#1}}The lists cannot be given a name by the user.3548 \def\MT@declare@char@inh#1#2#3{%3549 \MT@edef@n{MT@#1@inh@name}%3550 {\MT@curr@file/\the\inputlineno (\@nameuse{MT@abbr@#1})}%3551 \MT@let@cn\MT@curr@set@name{MT@#1@inh@name}%3552 \MT@ifdefined@c@T\MT@extra@inputenc{%3553 \MT@xdef@n{MT@#1@inh@\MT@curr@set@name @inputenc}{\MT@extra@inputenc}}%3554 \MT@dinfo{1}{creating inheritance list `\@nameuse{MT@#1@inh@name}’}%3555 \MT@gdef@n{MT@#1@inh@\csname MT@#1@inh@name\endcsname}{#3}%3556 \def\MT@permutelist{#1@inh}%3557 \setkeys{MT@inh}{#2}%3558 \MT@permute3559 }Parse the second argument. \DeclareCharacterInheritance may also be set upfor various combinations. We can reuse the key setup from the configuration lists(\Set...).3560 \MT@define@code@key{encoding}{inh}3561 \MT@define@code@key@family {inh}3562 \MT@define@code@key{series} {inh}3563 \MT@define@code@key{shape} {inh}3564 \MT@define@code@key@size {inh}3565 \MT@define@code@key@font {inh}Now parse the third argument, the inheritance lists. We define the commands\MT@inh@〈name〉@〈slot〉@, containing the inheriting characters. They will also betranslated to slot numbers here, to save some time. The following will be executedonly once, namely the first time this inheritance list is encountered (in\MT@set@〈feature〉@codes).3566 \def\MT@inh@do#1,{%3567 \ifx\relax#1\@empty \else3568 \MT@inh@split #1==\relax3569 \expandafter\MT@inh@do3570 \fi3571 }Only gather the inheriting characters here. Their codes will actually be set in\MT@set@〈feature〉@codes.3572 3573 3574 \def\MT@inh@split#1=#2=#3\relax{%3575 \def\@tempa{#1}%3576 \ifx\@tempa\@empty \else3577 \MT@get@slot3578 \ifnum\MT@char > \m@ne