This always subtracted the glyph width of a space, despite isspace
also accepting newlines and a few other characters. It now also uses
AK/CharacterTypes.h. :^)
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
