The microtype package

IMPLEMENTATION: Package options 131\MT@setup@kerning\MT@error@doesnt@work\MT@setup@warntracking4385 interword spacing will disable it. You might want\MessageBreak4386 to add `\@backslashchar\MT@MT context{spacing=nonfrench}’\MessageBreak4387 to your preamble}%4388 }%4389 \fi4390 \fi4391 \fi4392 }4393 \def\MT@setup@kerning{%4394 \ifMT@kerning4395 \edef\MT@active@features{\MT@active@features,kn}%4396 \pdfprependkern\@ne4397 \pdfappendkern\@ne4398 \MT@info@nl{Adjustment of character kerning enabled}%4399 \MT@check@active@set{kn}%4400 \else4401 \let\MT@kerning\relax4402 \MT@info@nl{No adjustment of character kerning}%4403 \fi4404 }4405 If pdfTEX is too old, we disable tracking, spacing and kerning, and throw an errormessage. We also switch the features off for LuaTEX and TEX.4406 }{4407 4408 \def\MT@setup@tracking{%4409 \ifMT@tracking4410 \MT@error{The tracking feature only works with luatex 0.62\MessageBreak4411 or newer. Switching it off}{Upgrade luatex.}%4412 \MT@trackingfalse4413 \MT@let@nc{MT@tracking}\relax4414 \else4415 \MT@info@nl{No adjustment of tracking (luatex too old)}%4416 \fi4417 }4418 }4419 4420 4421 \def\MT@error@doesnt@work#1{%4422 \csname ifMT@#1\endcsname4423 \MT@error{The #1 feature only works with pdftex 1.40\MessageBreak4424 or newer. Switching it off}4425 {Upgrade pdftex.}%4426 {Use pdftex instead.}%4427 \csname MT@#1false\endcsname4428 \MT@let@nc{MT@#1}\relax4429 \else4430 \MT@info@nl{No adjustment of #1%4431 \space(pdftex too old)%4432 }%4433 \fi4434 }4435 \def\MT@setup@tracking{\MT@error@doesnt@work{tracking}}4436 \def\MT@setup@kerning {\MT@error@doesnt@work{kerning}}4437 \def\MT@setup@spacing {\MT@error@doesnt@work{spacing}}4438 }4439 4440 \MT@addto@setup4441 \def\MT@setup@warntrackingEX