Plain ascii files have (ctrl-v)(ctrl-m) characters on the end of every line.

Question

Mac book Pro running 10.8 mountain lion.
My preferred editor is vim (it comes with 10.8).
When I re-edit a plain ascii file, every line ends with (ctrl-v) (ctrl-m).
They appear after saving the file to hard drive.
It started doing this just after moving from 10.7 to 10.8.
question 1: Is there some way to turn off this feature?
question 2: I wonder what I did to accidently turn on this feature?

Answer 1

Hi,
>>A CHAR datatype and VARCHAR2 datatype are stored identically (eg: the word 'WORD' stored in a CHAR(4) and a varchar2(4) consume exactly the same amount of space on disk, both have leading byte counts).
Ok, but on the other hands:
SGMS@ORACLE10> create table x (name char(10), name2 varchar2(10));
Table created.
SGMS@ORACLE10> insert into  x values ('hello','hello');
1 row created.
SGMS@ORACLE10> commit;
Commit complete.
SGMS@ORACLE10> select vsize(name),vsize(name2) from x;
VSIZE(NAME) VSIZE(NAME2)
         10            5
SGMS@ORACLE10> select dump(name),dump(name2) from x;
DUMP(NAME)                                         DUMP(NAME2)
Typ=96 Len=10: 104,101,108,108,111,32,32,32,32,32  Typ=1 Len=5: 104,101,108,108,111Cheers