dose wget auto-convert the downloaded text file?

[18 mao]

  hello everyone,i use wget to download some html files,and use vim to edit them,i fount that the newline has been replaced to "^M"(it's just my suspection,i know nothing about the encoding method),and when i changed to "uhex" mode of vim to find more details i found that "^M" is actually "<0d>".
the same thing happened when  formate of the file is "txt" ;

for example:
the original html file:
somthing here1
somthing here2
somthing here3

the file wget downloaded:
somthing here1 ^M somthing here2 ^M somthing here3

the downloaded file is smaller than the original file,that is the one point about this, maybe more converts for example,i cant tell but somthing has been replaced to "@"(i just know this means maybe a really null-line?)

i'm a newbie of this mailing lists,please tell me if there is anything wrong with my statements ,thanks very much for further replies