Eliminate K/K++ comments

• one-line comments (K++): kk...
• multi-line-comments (K): ko...ok

#!/bin/sed -f

# delete K++ comments
/^[[:blank:]]*kk.*/d
s/kk.*//

# If no comment is found, then start a new cicle
: test
/ko/!b

# Append new lines to the pattern space until a entire K-comment is in the
# pattern space
: append
/ok/!{N;b append;}

# delete every K-comment (but don't be greedy!)
s/ko\([^o]\|o[^k]\)*o\?ok//g

t test