Fix 'very magic'

From :help magic
==============

Use of "\v" means that in the pattern after it all ASCII characters except
'0'-'9', 'a'-'z', 'A'-'Z' and '_' have a special meaning.  "very magic"

Use of "\V" means that in the pattern after it only the backslash has a
special meaning.  "very nomagic"

The current vim-oblique is actually setting 'very nomadic'.