Backward search in the internal viewer

[Andrew V. Samoilov]

Hello,

this feature is documented, but I don't know was this one implemented 
before 4.1.  I implemented it for normal and hex search in 2000,
but it was rejected because it had not regular search.

I have no ideas how to implement this search for ^[a-b], ^[^c-G\]\] and 
^(bif|foo)? cases without much efforts.

Any ideas?

-- 
Regards,
Andrew V. Samoilov