backward_search

Description:

public bool backward_search (string str, TextSearchFlags flags, out TextIter match_start, out TextIter match_end, TextIter? limit)

Same as forward_search, but moves backward.

match_end will never be set to a `GtkTextIter` located after this, even if there is a possible match_start before or at this.

this	a `GtkTextIter` where the search begins
str	search string
flags	bitmask of flags affecting the search
match_start	return location for start of match
match_end	return location for end of match
limit	location of last possible `match_start`, or null for start of buffer

whether a match was found