possible Errors in Emacs.el ?

[Henry Helm]

Hello dear developers,
I have downloaded the Emacs 21.1-Version and compared some syntax of commands.
I found the following parts, which may be errors in the *.el - Files:

case-fold-search        against case-fold-serch
        (setq case-fold-search (cdr case-fold)))
        (case-fold-serch t))

C_FILLPATTERN           against C_FILL_PATTERN (in idlw-rinfo.el)
        "C_COLOR" "C_FILLPATTERN" "C_LINESTYLE"
        ("C_COLOR") ("C_FILL_PATTERN") ("C_LINESTYLE")

redraw-mode-line        against redraw-modeline 
        (if (boundp 'redraw-mode-line)
        (if (fboundp 'redraw-modeline)

WORLDTITLE              against WOLRDTITLE
        "WORLDINFO" "WORLDTITLE" "IDLGRVRMLBOTTOM")
        ("UVALUE") ("WOLRDTITLE") ("WORLDINFO")))

SUPPRESS_VALUE          against SUPRESS_VALUE
        ("SENSITIVE") ("SUPPRESS_VALUE") ("TITLE")
        ("SCROLL") ("SUPRESS_VALUE") ("TITLE")

prefered-coding-system  against preferred-coding-system
        (or (get-charset-property charset 'prefered-coding-system)
        (put-charset-property (car (car l)) 'preferred-coding-system (cdr (car 
l)))

I'am don't know all about with lisp-syntax, I have compared these parts only.
I hope, this possible errors can help You to correct the emacs-source-code.
Is this a apropriate way to check for errors ?

Henry Helm,
Dresden