Thats why I'm glad D chose '~' as a binary concatenation operator so that there is never any confusion.
Looking forward languages that will start making good use of Unicode! I am actually surprised Greek letters haven’t made it already. Lots of computer scientists are mathematicians that are used to math papers looking like an Ancient Greek tablet.
See page 24 of http://www.oracle.com/technetwork/systems/ts-5206-159453.pdf
They also had an ASCII-only representation for everything, so you could use a regular text editor if you wanted, kind of like Markdown.