10.35.1 Top new questions this week

10.35.1.1 Why Donald E. Knuth used obeylines + gdef instead of def

https://tex.stackexchange.com/landing/r/digest?cta=question&id=718381

I am trying to understand Knuth's manmac.tex. At line 436 you can find the following code: 
\newwrite\ans 
\immediate\openout\ans=answers % file for answers to exercises 
\outer\def\answer{\par\medbreak 
... 
[macros] [plain-tex] [obeylines]
 

asked by Alexey Ismagilov https://tex.stackexchange.com/landing/r/digest?cta=user&id=171124 Score of 9

answered by Phelype Oleinik https://tex.stackexchange.com/landing/r/digest?cta=user&id=134574 Score of 11

10.35.1.2 How to name a TikZ path?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=718391

How do I name the indicated TikZ path with a name such as X and subsequently use it, for example, to draw it? 
The code shown does not compile! 
\documentclass[tikz,border=0pt]{standalone} 
\begin{... 
[tikz-pgf]
 

asked by murray https://tex.stackexchange.com/landing/r/digest?cta=user&id=13492 Score of 8

answered by AndrA~(c)C https://tex.stackexchange.com/landing/r/digest?cta=user&id=138900 Score of 16

10.35.1.3 Custom multiple \str_case:nn a^\200\224 expl3

https://tex.stackexchange.com/landing/r/digest?cta=question&id=718274

I'm trying to create a custom more advanced function with a structure similar to 
\str_case:nn {a^\237..test stringa^\237(c)} 
{ 
{a^\237..string case1a^\237(c)} {a^\237..code case1a^\237(c)} 
{a^\237..string case2a^\237(c)} {a^\237..code case2a^\237(c)} 
... 
{a^\237..string ... 
[expl3] [latex3]
 

asked by antshar https://tex.stackexchange.com/landing/r/digest?cta=user&id=213149 Score of 7

answered by F. Pantigny https://tex.stackexchange.com/landing/r/digest?cta=user&id=163000 Score of 8

10.35.1.4 Spacing and vertical lines on a tabularx

https://tex.stackexchange.com/landing/r/digest?cta=question&id=718237

I made a table with tabular with the following code: 
\documentclass[12pt,a4paper]{article} 
\begin{document} 
\begin{table}[ht!]\centering\begin{tabular}{|c|c|c|c|} 
\hline Regulator&$K_p$&$T_i$... 
[tables] [tabularx]
 

asked by User https://tex.stackexchange.com/landing/r/digest?cta=user&id=320358 Score of 6

answered by cfr https://tex.stackexchange.com/landing/r/digest?cta=user&id=39222 Score of 3

10.35.1.5 TikZ: how prevent darker fill in overlapping regions?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=718115

In this TikZ picture, how do I prevent the overlapping regions from becoming darker than the rest? I want the overlap to be the same uniform color as the rest of the regions. 
\documentclass[tikz,... 
[tikz-pgf] [fill]
 

asked by murray https://tex.stackexchange.com/landing/r/digest?cta=user&id=13492 Score of 6

answered by samcarter_is_at_topanswers.xyz https://tex.stackexchange.com/landing/r/digest?cta=user&id=36296 Score of 9

10.35.1.6 How can I align twice a math equation

https://tex.stackexchange.com/landing/r/digest?cta=question&id=718032

The code is: 
\documentclass[12pt]{article} 
\usepackage{fontspec} 
\usepackage{graphicx} % Required for inserting images 
\usepackage{extarrows} 
\usepackage{listings} 
\usepackage{wasysym, amsmath, ... 
[align] [aligned]
                                                                                  

                                                                                  
 

asked by Ariel Fishbein https://tex.stackexchange.com/landing/r/digest?cta=user&id=295073 Score of 6

answered by Sebastiano https://tex.stackexchange.com/landing/r/digest?cta=user&id=117876 Score of 8

10.35.1.7 Node in a middle of a line strange behaviour

https://tex.stackexchange.com/landing/r/digest?cta=question&id=718033

As you can see, the Greek letter theta which is expected to be just below the curved stroke instead takes on a completely unexpected position. 
What could it be due to? 
\documentclass[14pt]{article} 
\... 
[positioning] [tikz-arrows] [nodes] [alignment]
 

asked by user3204810 https://tex.stackexchange.com/landing/r/digest?cta=user&id=105478 Score of 6

answered by Andrew Stacey https://tex.stackexchange.com/landing/r/digest?cta=user&id=86 Score of 9