5.30.1 Top new questions this week

5.30.1.1 Blogging in LaTeX
5.30.1.2 What is "latex-dev"?
5.30.1.3 Why does this regexpatch command only work once, not twice?
5.30.1.4 How to number subfigures in Serbian Cyrillic?
5.30.1.5 Connecting points from separate Tikz figures
5.30.1.6 Is there a way to retrieve the 'source code' and the argument pattern from a macro for reuse (i.e. what \show shows)?
5.30.1.7 Underbrace in equation
5.30.1.1 Blogging in LaTeX

https://tex.stackexchange.com/landing/r/digest?cta=question&id=506578

It seems to me that all (static) blogging frameworks, e.g. Jekyll and Hugo use Markdown as format for blog posts. But according to 
Hartla^\200\231s Tenth Rule of Typesetting 
Any sufficiently  ... 
[conversion] [html] [markdown]
 
asked by asmaier https://tex.stackexchange.com/landing/r/digest?cta=user&id=11404 21 votes
answered by michal.h21 https://tex.stackexchange.com/landing/r/digest?cta=user&id=2891 17 votes
5.30.1.2 What is "latex-dev"?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=506646

no answer needed, I'm adding the question as reference 
The package/update manager of my  TeX-system installed in the last weeks a number of packages called latex-XX-dev, and CTAN too shows a number  ... 
[packages] [latex3] [latex-base] [beta-testing]
 
asked by Ulrike Fischer https://tex.stackexchange.com/landing/r/digest?cta=user&id=2388 20 votes
answered by Ulrike Fischer https://tex.stackexchange.com/landing/r/digest?cta=user&id=2388 15 votes
5.30.1.3 Why does this regexpatch command only work once, not twice?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=506623

Based on an early version of How can I add a single curly brace to a macro?, I have tried the following to add, one by one, inner commands to some outer command. (The reason I am doing this is that I  ... 
[patching] [l3regex]
 
asked by bers https://tex.stackexchange.com/landing/r/digest?cta=user&id=30810 7 votes
answered by Phelype Oleinik https://tex.stackexchange.com/landing/r/digest?cta=user&id=134574 6 votes
5.30.1.4 How to number subfigures in Serbian Cyrillic?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=506469

How can I number subfigures using Serbian Cyrillic letters: (EthDegree), (Eth+-), (Eth\262), (Eth\263), (Eth\264) and so on? I'd like the solution to be compatible with Polyglossia. 
Here's the MWE for the question. 
... 
[subfloats] [polyglossia] [cyrillic]
 
asked by Milos https://tex.stackexchange.com/landing/r/digest?cta=user&id=47587 7 votes
answered by Marijn https://tex.stackexchange.com/landing/r/digest?cta=user&id=89417 8 votes
5.30.1.5 Connecting points from separate Tikz figures

https://tex.stackexchange.com/landing/r/digest?cta=question&id=506407

I have this code to draw an oscilloscope: 
\documentclass[12pt]{standalone} 
\usepackage{newtxtext,newtxmath} 
\usepackage{tikz} 
\begin{document} 
\def\scl{1}%scaling factor of the picture 
... 
[tikz-pgf] [tikz-styles]
 
asked by Rodrigo https://tex.stackexchange.com/landing/r/digest?cta=user&id=133705 7 votes
answered by SchrA~\[Paragraph]dinger's cat https://tex.stackexchange.com/landing/r/digest?cta=user&id=194703 11 votes
5.30.1.6 Is there a way to retrieve the 'source code' and the argument pattern from a macro for reuse (i.e. what \show shows)?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=507016

I want to concatenate the 'source code' of two macros which share the same argument signature. How do I grab (i.e. expand once) the macro without TeX searching for the arguments which the macro  ... 
[macros] [expansion] [pgfkeys] [arguments]
 
asked by Robert Siemer https://tex.stackexchange.com/landing/r/digest?cta=user&id=15894 6 votes
answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 4 votes
5.30.1.7 Underbrace in equation

https://tex.stackexchange.com/landing/r/digest?cta=question&id=506536

What is wrong with underbrace please, there is no text below after the compilation 
\begin{equation} 
\underbrace{{\color{red}I_j (x)} \ast \Delta_j(x,t_l,{\color{red}p})}_{\text{I_j(x)(x-v_j(t,p))}}  ... 
[equations] [underbrace]
 
asked by Marcia Cross https://tex.stackexchange.com/landing/r/digest?cta=user&id=195597 6 votes
answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 10 votes