1 <start> and <end> can take one of these forms:
5 If <start> or <end> is a number, it specifies an
6 absolute line number (lines count from 1).
11 This form will use the first line matching the given
12 POSIX regex. If <start> is a regex, it will search from the end of
13 the previous `-L` range, if any, otherwise from the start of file.
14 If <end> is a regex, it will search
15 starting at the line given by <start>.
20 This is only valid for <end> and will specify a number
21 of lines before or after the line given by <start>.
24 If ``:<regex>'' is given in place of <start> and <end>, it denotes the range
25 from the first funcname line that matches <regex>, up to the next