Ok.. so 2nd stab.


works for object_5_0.C hits

grep --color='auto' -P '^\t\t:|[^\x00-\x7F]' objects_5_0.C | grep -B1 -P '^\t\t\t'

This works for rulebases_5_0.fws hits 

grep --color='auto' -P 'rule-base|[^\x00-\x7F]' rulebases_5_0.fws | grep -P -B 1 '^\t\t\t'