Must have been copied from the proposition line, and not fixed.
("definition" ?D "def:" "~\\ref{%s}" t ("definitions?" "def\\.") -2)
("proposition" ?P "prop:" "~\\ref{%s}" t
("propositions?" "prop\\.") -2)
("definition" ?D "def:" "~\\ref{%s}" t ("definitions?" "def\\.") -2)
("proposition" ?P "prop:" "~\\ref{%s}" t
("propositions?" "prop\\.") -2)
- ("lemma" ?P "lem:" "~\\ref{%s}" t ("lemmas?" "lem\\.") -2)
+ ("lemma" ?L "lem:" "~\\ref{%s}" t ("lemmas?" "lem\\.") -2)
("example" ?X "eg:" "~\\ref{%s}" t ("examples?") -2)
("exercise" ?E "ex:" "~\\ref{%s}" t ("exercises?" "ex\\.") -2)
("enumerate" ?i "i:" "~\\ref{%s}" item ("items?"))))
("example" ?X "eg:" "~\\ref{%s}" t ("examples?") -2)
("exercise" ?E "ex:" "~\\ref{%s}" t ("exercises?" "ex\\.") -2)
("enumerate" ?i "i:" "~\\ref{%s}" item ("items?"))))