Displaying a Euro symbol is incorrect in HTML 4 (but the expected result in HTML 5): €.

See http://www.w3.org/International/questions/qa-controls.

HTML parser test:

• I'm ¬it; I tell you.
• I'm ¬it; I tell you.

In HTML 5, the two lines above should be rendered in the same way. See HTML 5, Tokenizing character references.