prune formatting when outputting

[Ruzihm]

Closes #1601

Test case:

	verb/test_improper()
		var/x1 = "\proper something (proper)"
		var/x2 = "\improper something (improper)"
		world.log << "\a [x1]"
		world.log << "\a [x2]"
		world.log << x1
		world.log << x2

BYOND:

something (proper)
a something (improper)
something (proper)
something (improper)

Before PR:

[INFO] world.log: something (proper)
[INFO] world.log: a something (improper)
[INFO] world.log: ０something (proper)
[INFO] world.log: １something (improper)

With PR:

[INFO] world.log: something (proper)
[INFO] world.log: a something (improper)
[INFO] world.log: something (proper)
[INFO] world.log: something (improper)