The microtype package

IMPLEMENTATION: Configuration 110\MT@warn@nodim3386 \MT@requires@pdftex7{3387 \define@key{MT@ex@c}{context}[]{%3388 \MT@ifempty{#1}\relax{%3389 \MT@glet\MT@copy@font\MT@copy@font@3390 \def\MT@extra@context{#1}%3391 }%3392 }3393 \MT@addto@setup{%3394 \define@key{MT@ex@c}{context}[]{%3395 \ifx\MT@copy@font\MT@copy@font@3396 \MT@ifempty{#1}\relax{\def\MT@extra@context{#1}}%3397 \else3398 \MT@error{\MT@MT\space isn’t set up for expansion contexts.\MessageBreak3399 Ignoring `context’ key\on@line}%3400 {Either move the settings inside the preamble,\MessageBreak3401 or load the package with the `copyfonts’ option.}%3402 \fi3403 }%3404 }Protrusion contexts may also work without copying the font, so we don’t issuean error but only a warning. The problem is that pdfTEX only allows one set ofprotrusion factors for a given font within one paragraph (those that are in effect atthe end of the paragraph will be in effect for the whole paragraph). When differentfonts are loaded – like in the example with the footnote markers – we don’t needto copy the fonts.3405 \define@key{MT@pr@c}{context}[]{%3406 \MT@ifempty{#1}\relax{%3407 \MT@glet\MT@copy@font\MT@copy@font@3408 \def\MT@extra@context{#1}%3409 }%3410 }3411 \MT@addto@setup{%3412 \define@key{MT@pr@c}{context}[]{%3413 \MT@ifempty{#1}\relax{\def\MT@extra@context{#1}}%3414 \ifx\MT@copy@font\MT@copy@font@\else3415 \MT@warning@nl{If protrusion contexts don’t work as expected,3416 \MessageBreak load the package with the `copyfonts’ option}%3417 \fi3418 }%3419 }3420 3421 3422 }{3423 \define@key{MT@ex@c}{context}[]{%3424 \MT@error{Expansion contexts only work with pdftex 1.40.4\MessageBreak3425 or later. Ignoring `context’ key\on@line}%3426 {Upgrade pdftex.}%3427 }3428 3429 3430 \define@key{MT@pr@c}{context}[]{%3431 \MT@error{Protrusion contexts only work with pdftex3432 1.40.4\MessageBreak or later.3433 \MessageBreak or luatex.3434 Ignoring `context’ key\on@line}%3435 {Upgrade pdftex.}%3436 {Use pdftex or luatex.}%3437 }3438 3439 }