Hidden characters Memes

The epic saga of string comparison in programming languages! First, our protagonist thinks ";" equals ";" (seems logical). Then he insists ";" is not equal to ";" (wait, what?). The plot thickens when he discovers that while the strings look identical, their MD5 hashes match - revealing they're actually the same data! Finally, the revelation: "&#59;" isn't equal to ";" because one is actually character code 59 in disguise! That invisible Unicode trickster or non-printable character just wasted 80 hours of your life. The compiler knew all along but chose violence.