Optimising and inlining Smalltalk message sends: https://clementbera.wordpress.com/2014/08/12/arithmetic-inlined-and-special-selectors/ -- interesting discussion of JIT weaknesses.
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Doing another iteration on my diagnostics display. I'm reasonably happy with the bold highlighting within the error message.
I'm not sure about the colour on Warning and Error though. It gives the output some visual structure, but arguably the message itself is more important.
"Example Driven Development" using Glamorous and Pharo Smalltalk: https://medium.com/feenk/an-example-of-example-driven-development-4dea0d995920
Tests returning values and composing is a really interesting model. It establishes structure and shows which test failure is the most 'fundamental'.
Do you have a favourite way of highlighting text in a CLI error message? Currently I'm using backticks, but I'm wondering what's the most readable.