The microtype package

IMPLEMENTATION: Font setup 79\MT@tr@outer@icr\MT@tr@outer@icr@\MT@xspace\textls\MT@ls@adjust@2014 \MT@dinfo2{]]] adjusting post space (3): \the\MT@outer@space}%2015 }%2016 }{%2017 \MT@if@outer@next\ \relax{%2018 \MT@if@outer@next\space\relax{%2019 \MT@if@outer@next\@xobeysp\relax{%xspace requires special treatment.2020 \MT@if@outer@next\xspace{%2021 \def\MT@temp*\xspace{\futurelet\@let@token\MT@xspace}%2022 }{%If there’s no outer spacing, there may be outer kerning.2023 \def\MT@temp*{\ifdim\MT@outer@kern=\z@\else\MT@ls@outer@k2024 \MT@dinfo2{--- adjusting post kern: \the\MT@outer@kern}%2025 \fi}%2026 \MT@let@nc{MT@tr@outer@next}\relax2027 }}}}}}}}\fi2028 \fi\fi2029 \MT@temp*%2030 }Helper macros for the italic correction mess.2031 \def\MT@tr@outer@icr{\afterassignment\MT@tr@outer@icr@\MT@tr@outer@r@}2032 \def\MT@tr@outer@icr@{%2033 \let\@let@token= \MT@tr@outer@next2034 \maybe@ic@2035 }If the group is followed by \xspace, we first feed \xspace with the next token, thencheck whether it has inserted a space.2036 \def\MT@xspace{\@xspace@firsttrue\@xspace2037 \ifdim\lastskip>5sp2038 \unskip \hskip\MT@outer@space2039 \else2040 \ifdim\MT@outer@kern=\z@\else\MT@ls@outer@k \fi2041 \fi2042 }For older pdfTEX versions and LuaTEX, throw an error.2043 }{2044 \DeclareRobustCommand\lsstyle{%2045 \MT@error{Letterspacing only works with \MT@engine tex version2046 1.40%2047 0.62%2048 \MessageBreak or newer}2049 {Upgrade \MT@engine tex, or try the `soul’ package instead.}%2050 \MT@glet\lsstyle\relax2051 }2052 }And forTEX, too.EX2053 2054 2055 \DeclareRobustCommand\lsstyle{%2056 \MT@error{Letterspacing currently doesn’t work with xetex}2057 {Run pdftex or luatex, or use the `soul’ package instead.}%2058 \MT@glet\lsstyle\relax2059 }2060 This command may be used like the other text commands. The starred versionremoves kerning on the sides. The optional argument changes the letterspacingfactor.