Is there any possibility to force RStudio (v1.2.830) to use != but =/=. I think that changes in the newest RStudio is very bad idea.
I’m not aware of this change.
Note that an upgrade of RStudio wouldn’t change this anyway, (faq: Differentiating R from RStudio)
Could you offer a reprex of this issue?
It's probably just how new Rstudio version support ligatures. Search for a "ligature" option in settings, or select a different font (that does not support ligatures)
Its just a display issue, it doesnt change the actual code
No such option (ligatures). For experienced people it doesn't matter but when you teach someone who starts learning R it does. We do not really need such fancy stuff.
This is really happening at the font level (as @hoelk mentioned) — RStudio is just doing a better job of rendering the fonts (or really, the new Chromium-based rendering engine is allowing support for the ligatures that were in the fonts all along).
These "programming ligatures" are definitely a matter of taste (here's Fira Code's case in favor) — some people like them so much that they hack them into fonts that don't support them natively!
While I agree they might be confusing for a brand new person, I don't think that a fresh RStudio installation uses a font with programming ligatures (happy to be corrected on that — I don't have a fresh install of RStudio handy!), and I suspect most brand new people are going to use the default font (or something super common like Consolas, which does not have programming ligatures).
@jcblum: I'm happy to hear that a default font does not support prog. ligatures. I use Fira Code that's why I see that. I love Fira fonts and probably I will get used to it but now I do not like it. I would have turned it off if it had been possible. As usually it's a matter of taste. Anyway thanks for explanations.
You can remove the ligatures from your installation of Fira Code if you never want them. Personally, this is one of the reasons that I always teach with the default fonts, or at least without a ligature font.