| - number | |
| + | |
| If <start> or <end> is a number, it specifies an | |
| absolute line number (lines count from 1). | |
| + | |
| - /regex/ | |
| + | |
| This form will use the first line matching the given | |
| POSIX regex. If <end> is a regex, it will search | |
| starting at the line given by <start>. | |
| + | |
| - +offset or -offset | |
| + | |
| This is only valid for <end> and will specify a number | |
| of lines before or after the line given by <start>. | |
| + |