No such file in 4.11
There is such a file in 6.4

*** generic-8.2-RELEASE/src/contrib/file/libmagic.man	Tue Dec 27 16:08:05 2011
--- generic-new/src/contrib/file/libmagic.man	Tue Dec 27 16:13:34 2011
***************
*** 127,132 ****
--- 127,133 ----
  Don't look for known tokens inside ascii files.
  .It Dv MAGIC_NO_CHECK_TROFF
  Don't look for troff sequences inside ascii files.
+ .\" JJLATER Do we need to add a Don't look for CTM sequences inside ascii files. ?
  .El
  .Pp
  The
