The characters that are selected are those characters at positions
from @start_pos up to, but not including @end_pos. If @end_pos is
negative, then the characters selected are those characters from
@start_pos to the end of the text.
Note that positions are specified in characters, not bytes.
Selects a region of text.
The characters that are selected are those characters at positions from @start_pos up to, but not including @end_pos. If @end_pos is negative, then the characters selected are those characters from @start_pos to the end of the text.
Note that positions are specified in characters, not bytes.