People have been drawing ASCII art since ASCII was invented, and control codes like the bell "character" existed even before computers did.
Which is still linear text all tools work with.
What's your definition of "text"?
(I define it as "written words in a human-readable language". You must have something else in mind, because neither ASCII art nor control codes fit my definition.)
A linear stream of non-null characters, the majority of content being printable glyphs.