Convert JS strings to use template literals. NFC

[kleisauke]

Marked as draft as this seems to regress code size, so perhaps it should not be done everywhere.

[kleisauke]

Commit 55a68e8 was automatically done with the Biome linter:

$ find src -type f -name '*.js' -exec sed -i -E -e '/^ *#(if|ifdef|elif|else|endif|include|warning|error|preprocess)/d' -e 's/[\{<]{3} .* [\}>]{3}//g' {} +
$ git add src
$ git commit -m"[Temp] Remove pre-process syntax"
$ npx @biomejs/biome lint --only=lint/style/useTemplate --write --unsafe --skip-parse-errors ./src
$ git add src
$ git commit -m"Convert JS strings to use template literals. NFC"

(see: https://biomejs.dev/linter/rules/use-template/)

Though, that doesn't fix all files due to Emscripten's pre-process syntax, so I also ran:

$ ./emcc test/hello_world.c -sINCLUDE_FULL_LIBRARY
$ npx @biomejs/biome lint --only=lint/style/useTemplate a.out.js

And then manually applied the fixes reported by that (in commit 25c22b5).

FWIW, the lint/complexity/useArrowFunction and lint/nursery/useNullishCoalescing lint rules might also be useful as follow-ups.

[sbc100]

Oh nice. I'd assued the "Remove pre-process syntax" part would generate malformed JS because of things like mismatched braces.

e.g. do we not have some places that do horrible things like:

if (x) { 
#if foo
  xxx
}
#else
  yyy
}
#endif