is unravel the best way to watch execution / understand how a package works

i can imagine a slightly "easier" ide type thing but if this is the challenge i accept

I wrote a similar debugging tool for step-by-step watching

See also tex.stackexchange.com/a/3746/250119

@tsj Piece of paper and a pen, I'd suggest - pick a macro, write down the input stack, work out the expansions and exectutions

@PauloCereda :) You're probably the tenth person to send me that, at least :þ Usually with the message: "Heard this for the first time. Immediately thought of you." XD

@Plergux baa :)

@Plergux Weird Al is cool :)

@daleif Maybe a small misprint (or I miss something): In ftp.acc.umu.se/mirror/CTAN/macros/latex/contrib/mathtools/…, page 28, where it is described why the \mathopen is important, the example should perhaps be \braket{A}{-B}{C} instead of \braket{A}{-B}, since \braket takes three arguments.

@PauloCereda He's amazing :D Have you seen his movie? The Vidiot from UHF, also known as Channel 62.

@Plergux ooh

@Plergux what's your fav song from him? :)

@PauloCereda oh gosh! That's a tough question! There are so many. Of his own probably Everything You Know Is Wrong and of the covers White and Nerdy :þ

@mickep du you mind registering an issue, then 7ll make sure to fix it (not at pc at the moment)

@daleif Feels a bit funny to open an issue for a three letter-fix, but sure I will :)

@mickep thanks, it's what it's for. I also use it to log "trivial" stuff that needs to be fixed, so I don't forget

@daleif Very good. It forced me to create a github account, and I guess that cannot be bad, either...

what is it with Firefox lately forbidding me to keep working just because there was an update :(

@Plergux ooh I am a fan of Hardware Store. :)

@mickep got my account for the same reason... To file an issue

@Skillmon The last few updates have been quite annoying - for me, the recognition of the system theme is now broken. FF goes from light mode into dark mode, but not the other way round, so each morning it is stuck there :(

@daleif I see. I guess we are not alone.

(I was actually wondering why there were \mathopen in the example. Why just open? Could it have been some other class, just to avoid the ord-bin-ord situation? It did not seem logical to me.)

Is there an easy test for whether a control sequence token corresponds to a font slot (not sure I'm saying this the right way) or something else? That is, I am looking for an easy test that can detect tokens like \$, \#, \$, etc. I am not looking to detect something like \mymacro, where \mymacro has, for example, been def'fed to an "A".

@StevenB.Segletes look to see if \meaning starts with \char ?

@DavidCarlisle Great idea! I'll give it a whirl.

@DavidCarlisle I see that works for \# and \%, but not for \$ nor \_. But if I can even reduce the special case exceptions to test for, that is a help. Thanks!

@StevenB.Segletes \$ needs special handling due to the "interesting" OT1 encoding that has it as £ in italic

@DavidCarlisle Aha. Good to know why.