5.29.1 Top new questions this week

5.29.1.1 How many lines of code does the original TeX contain?

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=505627

I am currently implementing a non-trivial software component (not related to typesetting), and would like to compare it to other components both from the same field and from other fields, including  ... 
[tex-core] [line] [web]
 

asked by juhist https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=132212 18 votes

answered by ShreevatsaR https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=48 29 votes

5.29.1.2 How to display a duck or marmot swallowed by a darkhole

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=505844

Following this question about representation of a darkhole, how could one represent a tikzduck or a tikzmarmot being swallowed by it. 
No animal should be harmed in the process. 
I think this solution  ... 
[pgfplots] [tikzducks] [tikzmarmots]
 

asked by BambOo https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=141947 13 votes

answered by SchrA~\[Paragraph]dinger's cathttps://tex.stackexchange.com/landing/r/newsletter?cta=user&id=194703 21 votes

5.29.1.3 "fF" letter combination seems to be typeset strangely or incorrectly

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=505607

My book is being copy-edited and the copy editor is complaining about the spacing of fF.  I looked carefully at it and was indeed shocked.  I had initially incorrectly concluded that there is a  ... 
[fonts] [ligatures] [scientific-notation]
 

asked by Pete P https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=50821 13 votes

answered by Mico https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=5001 17 votes

5.29.1.4 What does "rel" in `\mathrel` and `\stackrel` stands for?

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=505623

Most latex tags have straightforward meanings, for instance, 
\sqrt stands for/comes from "square root" 
\equiv stands for/comes from "equivalent to" 
What does "rel" in \mathrel and \stackrel stands  ... 
[math-mode] [math-operators]
 

asked by whnlp https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=195238 12 votes

answered by Mico https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=5001 22 votes

5.29.1.5 Two questions about typesetting a Roman missal

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=505534

I'm putting together a Roman missal for use by the laity at Traditional Latin Mass. Thus far, I've faced two main problems, which are apparent in my MWE. 
\documentclass[a6paper,pagesize,12pt]{book} 
... 
[horizontal-alignment] [multicol] [columnbreak]
 

asked by Gregor PerA"\215iA"\215 https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=126476 10 votes

answered by Davislor https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=61644 6 votes

5.29.1.6 What do these commands specifically do?

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=505686

\makeatletter 
\providecommand*{\input@path}{} 
\g@addto@macro\input@path{{./level1//}{./level1/level2//}{./level2//}} 
\makeatother 
I understand: 
\makeatletter 
\makeatother 
are just necessary for  ... 
[macros] [input] [paths]
 

asked by julkarham https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=194716 10 votes

answered by Mico https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=5001 18 votes

5.29.1.7 How to get trace to get a cylinder when I rotate a rectangle?

https://tex.stackexchange.com/landing/r/newsletter?cta=question&id=505731

I am trying to rotate a rectangle to make trace and get a cylinder. My code 
\documentclass[border=2mm,12pt,tikz]{standalone} 
\usepackage{tikz-3dplot} 
\begin{document} 
\pgfmathsetmacro{\myr}{3} 
... 
[3d] [tikz-3dplot]
 

asked by Thuy Nguyen https://tex.stackexchange.com/landing/r/newsletter?cta=user&id=180726 9 votes

answered by SchrA~\[Paragraph]dinger's cathttps://tex.stackexchange.com/landing/r/newsletter?cta=user&id=194703 13 votes