   (factor-second-word-regex
    '("IN:" "USE:" "FROM:" "EXCLUDE:" "QUALIFIED:" "QUALIFIED-WITH:")))
 
-(defconst factor-using-lines-regex "^\\(USING\\):[ \n]+\\([^;]+\\);")
+(defconst factor-using-lines-regex "^\\(USING\\):[ \n\t]+\\([^;]*\\);")
 
 (defconst factor-int-constant-def-regex
   (factor-second-word-regex '("ALIEN:" "CHAR:" "NAN:")))

    (,factor-constant-words-regex . 'factor-font-lock-constant)
    (,factor-parsing-words-regex . 'factor-font-lock-parsing-word)))


;;; Source code analysis:


  '(":" "::" ";" "&:" "<<" "<PRIVATE" ">>"
    "ABOUT:" "AFTER:" "ALIAS:" "ALIEN:" "ARTICLE:"
    "B" "BEFORE:"
    "C:" "CALLBACK:" "C-GLOBAL:" "C-TYPE:" "CHAR:" "COLOR:" "COM-INTERFACE:" "CONSTANT:"
    "CONSULT:" "call-next-method"
    "DEFER:" "DESTRUCTOR:"
    "EBNF:" ";EBNF" "ENUM:" "ERROR:" "EXCLUDE:"
