[TheFluff]

Most modern languages provide facilities for both line breaks and various quote characters inside string literals, and usually some form of variable interpolation as well. Heredocs provide the first in languages such as Perl (and in Perl also the third), but what Avisynth script really lacks is an escape character (e.g. backslash) to provide the second. In languages that don’t have heredocs, multi-line string literals are sometimes provided via some special quote character (c.f. JavaScript, which uses `backticks` for this). The triple quote serves the same purpose in Avisynth script, but you can’t escape it.