Allow more than one of them (or *'s or >'s).
(defconst adaptive-fill-mode t
"*Non-nil means determine a paragraph's fill prefix from its text.")
-(defconst adaptive-fill-regexp "[ \t]*\\([#;>*] +\\)?"
+(defconst adaptive-fill-regexp "[ \t]*\\([#;>*]+ +\\)?"
"*Regexp to match text at start of line that constitutes indentation.
If Adaptive Fill mode is enabled, whatever text matches this pattern
on the second line of a paragraph is used as the standard indentation