我最近通过 MacPorts 安装了 texlive，并尝试使用以前使用过的 acro 包来处理一些首字母缩略词。我已正确定义所有首字母缩略词，并且它们打印正确，除了位于句子末尾的情况。下面是一个最低限度的工作示例。
\documentclass{article}
\usepackage{acro}
\DeclareAcronym{RR}{
short = RR ,
long = rain rate
}
\begin{document}
In this sentence \ac{RR} is used before the end of the sentence.
It is very inteseting what happens when we wait until the end of the sentence to discuss \ac{RR}.
\end{document}
以下是 pdflatex 的输出：
This is pdfTeX, Version 3.14159265-2.6-1.40.17 (TeX Live 2016/MacPorts 2016_4) (preloaded format=pdflatex)
restricted \write18 enabled.
entering extended mode
(./Testing.tex
LaTeX2e <2016/03/31>
Babel <3.9r> and hyphenation patterns for 47 language(s) loaded.
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/base/article.cls
Document Class: article 2014/09/29 v1.4h Standard LaTeX document class
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/base/size10.clo))
(/atmomounts/home/grad/kwodzicki/Library/texmf/tex/latex/misc/cgnieder-acro-83c
237f56dd4/acro.sty
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/l3kernel/expl3.sty
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/l3kernel/expl3-code
.tex)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/l3kernel/l3pdfmode.
def))
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/l3experimental/l3so
rt/l3sort.sty)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/l3packages/xparse/x
parse.sty)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/l3packages/l3keys2e
/l3keys2e.sty)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/l3packages/xtemplat
e/xtemplate.sty)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/etoolbox/etoolbox.s
ty)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/oberdiek/zref-abspa
ge.sty
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/oberdiek/zref-base.
sty
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/generic/oberdiek/ltxcmds.
sty)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/generic/oberdiek/infwarer
r.sty)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/generic/oberdiek/kvsetkey
s.sty
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/generic/oberdiek/etexcmds
.sty
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/generic/oberdiek/ifluatex
.sty)))
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/generic/oberdiek/kvdefine
keys.sty)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/generic/oberdiek/pdftexcm
ds.sty
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/generic/oberdiek/ifpdf.st
y))
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/oberdiek/auxhook.st
y))
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/generic/oberdiek/atbegshi
.sty))
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/translations/transl
ations.sty
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/cnltx/cnltx-base.st
y
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/pgfopts/pgfopts.sty
(/Volumes/localdata/opt/local/share/texmf/tex/latex/pgf/utilities/pgfkeys.sty
(/Volumes/localdata/opt/local/share/texmf/tex/generic/pgf/utilities/pgfkeys.cod
e.tex
(/Volumes/localdata/opt/local/share/texmf/tex/generic/pgf/utilities/pgfkeysfilt
ered.code.tex))))
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/xcolor/xcolor.sty
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/graphics-cfg/color.
cfg)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/pdftex-def/pdftex.d
ef))
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/trimspaces/trimspac
es.sty))
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/koma-script/scrlfil
e.sty
Package scrlfile, 2016/05/10 v3.20 KOMA-Script package (loading files)
Copyright (C) Markus Kohm
)))
No file Testing.aux.
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/context/base/mkii/supp-pd
f.mkii
[Loading MPS to PDF converter (version 2006.09.02).]
)
(/Volumes/localdata/opt/local/share/texmf-texlive/tex/latex/translations/transl
ations-basic-dictionary-english.trsl)
! Undefined control sequence.
<argument> \prop_get:Nn
\l__acro_trailing_actions_prop {.}
l.12 ...he end of the sentence to discuss \ac{RR}.
? s
OK, entering \scrollmode...
! Undefined control sequence.
<argument> \LaTeX3 error:
A property list was misused.
l.12 ...he end of the sentence to discuss \ac{RR}.
! Undefined control sequence.
<argument> \LaTeX3 error:
A property list was misused.
l.12 ...he end of the sentence to discuss \ac{RR}.
! Undefined control sequence.
<argument> \LaTeX3 error:
A property list was misused.
l.12 ...he end of the sentence to discuss \ac{RR}.
[1{/Volumes/localdata/opt/local/var/db/texmf/fonts/map/pdftex/updmap/pdftex.map
}] (./Testing.aux
LaTeX Warning: Acronyms may have changed. Please rerun LaTeX.
) )
(see the transcript file for additional information)</Volumes/localdata/opt/loc
al/share/texmf-texlive/fonts/type1/public/amsfonts/cm/cmr10.pfb>
Output written on Testing.pdf (1 page, 15517 bytes).
Transcript written on Testing.log.
这是输出文件中显示的文本。
In this sentence rain rate (RR) is used before the end of the sentence. It is very inteseting what happens when we wait until the end of the sentence to discuss .RR.
如您所见，在句末句号 (.) 前使用首字母缩略词会出现非致命错误。错误如下：
! Undefined control sequence.
<argument> \prop_get:Nn
\l__acro_trailing_actions_prop {.}
l.12 ...he end of the sentence to discuss \ac{RR}.
从输出文本来看，这会导致在首字母缩略词前放置一个句号。您知道这是怎么回事吗？我尝试过 deactive-trailing-tokes，但这也会导致错误。例如，如果我在最小工作示例中加载 acro 包后添加以下代码行：
\acsetup{deactivate-trailing-tokens = {dot}}
我收到以下错误：
! Undefined control sequence.
\acro_deactivate_trailing_token:n ...emove_all:NV
\l__acro_trailing_tokens_t...
l.4 \acsetup{deactivate-trailing-tokens = {dot}}
我认为这是最近更新中引入的一个错误，因为我以前使用过这个包，没有问题。