strip control codes

Author: willmcgugan

src/textual/content.py

@@ -193,6 +193,7 @@ def from_markup(cls, markup: str | Content, **variables: object) -> Content:
             if variables:
                 raise ValueError("A literal string is require to substitute variables.")
             return markup
+        markup = _strip_control_codes(markup)
         from textual.markup import to_content
 
         content = to_content(markup, template_variables=variables or None)