3.30.1 Top new questions this week

3.30.1.1 Core TeX "Hello, world!"

https://tex.stackexchange.com/questions/388352/core-tex-hello-world

As an experiment, I wish to write a manuscript in core TeX, which typesets the text "Hello, world!", and compile it without any format. 
If I was using the Plain TeX format, this program would be 
...
 

- asked by Evan Aad (28 votes), answered by ShreevatsaR (31 votes)

3.30.1.2 \leadsto from right to left

https://tex.stackexchange.com/questions/388618/leadsto-from-right-to-left

$a^\200\216\leadstoa^\200\216$  cause 
How one can write this from right to left?
 

- asked by user 1 (15 votes), answered by Mico (12 votes)

3.30.1.3 How is the TeX engine informed of the OS's end-of-line marker and file encoding?

https://tex.stackexchange.com/questions/388595/how-is-the-tex-engine-informed-of-the-oss-end-of-line-marker-and-file-encoding

The TeX engine processes the input file on a line-by-line basis (The TEXbook, p. 46). The first line will be read from the file, undergo some pre-processing (see below), and then the engine will start  ...
 

- asked by Evan Aad (11 votes), answered by egreg (12 votes)

3.30.1.4 Why doesn't a trailing tab typeset?

https://tex.stackexchange.com/questions/389030/why-doesnt-a-trailing-tab-typeset

Consider the following Plain TeX manuscript 
\catcode9=12\relax% ASCII 9 is tab 
.\ \ .\par% 
. 
.% 
\bye 
It's impossible to tell, but there's a tab just after the dot on the third manuscript line.  ...
 

- asked by Evan Aad (10 votes), answered by Heiko Oberdiek (5 votes)

3.30.1.5 Tilde below letter + subscript creates unwanted spacing

https://tex.stackexchange.com/questions/388772/tilde-below-letter-subscript-creates-unwanted-spacing

I use a tilde below a letter as a symbol for a vector. Redefining the \vec-command delivers a good output, but subscripts are a pain. 
I'm using the following code: 
...
 

- asked by jaytar (10 votes), answered by egreg (7 votes)

3.30.1.6 What is the recommended way to protect a TeX Live file from updates with no changes or to auto-patch it on such updates?

https://tex.stackexchange.com/questions/388721/what-is-the-recommended-way-to-protect-a-tex-live-file-from-updates-with-no-chan

Many package managers allow users to prevent certain packages from being updated. Often this is called 'pinning'. A pinned package is protected from automatic updates. This is useful, for example, if  ...
 

- asked by cfr 10votes

3.30.1.7 minted vs. listings: pros and cons

https://tex.stackexchange.com/questions/389191/minted-vs-listings-pros-and-cons

While I'm switching from minted to listings, I would like to ask you 
for this comparison. 
The following is what it comes to my mind till now: 
minted needs Pygments to work, listings does not (this  ...
 

- asked by CarLaTeX (9 votes), answered by samcarter (0 votes)