我无法理解下面代码片段的行为
\documentclass[letterpaper, 10 pt, conference]{ieeeconf}
\begin{document}
\subsubsection{stiffness} %--> There is no colon here!
\end{document}
从而产生
我的标题末尾多余的冒号是从哪里来\subsubsection的？
这是与上述编译相对应的日志文件。
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (MiKTeX 2.9.6960 64-bit) (preloaded format=pdflatex 2019.2.4) 17 SEP 2019 21:15
entering extended mode
**./root.tex
(root.tex
LaTeX2e <2018-12-01>
(IEEEconf.cls
Document Class: IEEEconf 2009/04/05 v1.4 IEEE Computer Society 8.5x11" conference proceedings
\@IEEEtrantmpdimenA=\dimen102
\@IEEEtrantmpdimenB=\dimen103
\@IEEEtrantmpcountA=\count80
\@IEEEtrantmpcountB=\count81
\@IEEEtrantmptoksA=\toks14
LaTeX Font Info: Try loading font information for OT1+ptm on input line 794.
("C:\Program Files\MiKTeX 2.9\tex/latex/psnfss\ot1ptm.fd"
File: ot1ptm.fd 2001/06/04 font definitions for OT1/ptm.
)
\@IEEEnormalsizefontbaselineskip=\skip41
-- This is a 10 point document.
\normalsizebaselineskip=\skip42
\normaljot=\skip43
LaTeX Font Info: Font shape `OT1/ptm/bx/n' in size <5> not available
(Font) Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/it' in size <5> not available
(Font) Font shape `OT1/ptm/b/it' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/n' in size <7> not available
(Font) Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/it' in size <7> not available
(Font) Font shape `OT1/ptm/b/it' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/n' in size <8> not available
(Font) Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/it' in size <8> not available
(Font) Font shape `OT1/ptm/b/it' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/n' in size <9> not available
(Font) Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/it' in size <9> not available
(Font) Font shape `OT1/ptm/b/it' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/n' in size <10> not available
(Font) Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/it' in size <10> not available
(Font) Font shape `OT1/ptm/b/it' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/n' in size <11> not available
(Font) Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/it' in size <11> not available
(Font) Font shape `OT1/ptm/b/it' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/n' in size <12> not available
(Font) Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/it' in size <12> not available
(Font) Font shape `OT1/ptm/b/it' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/n' in size <16> not available
(Font) Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/it' in size <16> not available
(Font) Font shape `OT1/ptm/b/it' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/n' in size <20> not available
(Font) Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/it' in size <20> not available
(Font) Font shape `OT1/ptm/b/it' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/n' in size <24> not available
(Font) Font shape `OT1/ptm/b/n' tried instead on input line 1113.
LaTeX Font Info: Font shape `OT1/ptm/bx/it' in size <24> not available
(Font) Font shape `OT1/ptm/b/it' tried instead on input line 1113.
\IEEEilabelindentA=\dimen104
\IEEEilabelindentB=\dimen105
\IEEEilabelindent=\dimen106
\IEEEelabelindent=\dimen107
\IEEEdlabelindent=\dimen108
\labelindent=\dimen109
\IEEEiednormlabelsep=\dimen110
\IEEEiedmathlabelsep=\dimen111
\IEEEiedtopsep=\skip44
\c@section=\count82
\c@subsection=\count83
\c@subsubsection=\count84
\c@paragraph=\count85
\c@IEEEsubequation=\count86
\abovecaptionskip=\skip45
\belowcaptionskip=\skip46
\c@figure=\count87
\c@table=\count88
\@IEEEeqnnumcols=\count89
\@IEEEeqncolcnt=\count90
\@IEEEtmpitemindent=\dimen112
\c@biography=\count91
\@IEEEtranrubishbin=\box27
) (root.aux)
\openout1 = `root.aux'.
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 3.
LaTeX Font Info: ... okay on input line 3.
LaTeX Font Info: Checking defaults for T1/cmr/m/n on input line 3.
LaTeX Font Info: ... okay on input line 3.
LaTeX Font Info: Checking defaults for OT1/cmr/m/n on input line 3.
LaTeX Font Info: ... okay on input line 3.
LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 3.
LaTeX Font Info: ... okay on input line 3.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 3.
LaTeX Font Info: ... okay on input line 3.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 3.
LaTeX Font Info: ... okay on input line 3.
** Conference Paper **
Before submitting the final camera ready copy, remember to:
1. Manually equalize the lengths of two columns on the last page
of your paper;
2. Ensure that any PostScript and/or PDF output post-processing
uses only Type 1 fonts and that every step in the generation
process uses the US letter (8.5in X 11in) paper size.
[1
{C:/Users/.../AppData/Local/MiKTeX/2.9/pdftex/config/pdftex.map}
]
(root.aux) )
Here is how much of TeX's memory you used:
779 strings out of 492946
13196 string characters out of 3135516
71718 words of memory out of 3000000
4758 multiletter control sequences out of 15000+200000
25846 words of font info for 55 fonts, out of 3000000 for 9000
1141 hyphenation exceptions out of 8191
26i,4n,19p,254b,105s stack positions out of 5000i,500n,10000p,200000b,50000s
{C:/Program Files/MiKTeX 2.9/fonts/enc/dvips/base/8r.enc}<C:/Progra
m Files/MiKTeX 2.9/fonts/type1/urw/times/utmri8a.pfb>
Output written on root.pdf (1 page, 9150 bytes).
PDF statistics:
11 PDF objects out of 1000 (max. 8388607)
0 named destinations out of 1000 (max. 500000)
1 words of extra memory for PDF output out of 10000 (max. 10000000)
附言1上面的输出是 pdfLaTeX 的修饰，但 XeLaTeX 的结果也是相同的。
附言2我在 Windows-10 机器上使用 MikTeX 2.9.6972。
附言 3ieeeconf通过替换IEEEconf（文档类别：IEEEconf 2009/04/05 v1.4 IEEE 计算机协会 8.5x11”会议记录）， 可以重现相同的结果。