String escapes

E uses C-style backslash escapes within string and character literals. The defined escapes are:

Consensus has not been reached on handling non-BMP characters. All other backslash-followed-by-character sequences are syntax errors.

Within E quasiliterals, backslash is not special and  plays the same role;

? println(`1 + 1$\n= ${1 + 1}`) 1 + 1 = 2