2.11BSD/src/share/learn/editor/L34.2a

#print
You can also specify "all characters except ..."
using an expression of the form
 [^ab]
which means "any character except the letters 'a' or 'b'.
This is just like filename patterns again.  Does
  [^abc]
match the letter 'a'? Answer "yes" or "no".
#copyin
#user
#uncopyin
#match no
#log
#next
34.2b 5