'' and '' can take one of these forms:
- number
+
If '' or '' 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 '' is a regex, it will search from the end of
the previous `-L` range, if any, otherwise from the start of file.
If '' is `^/regex/`, it will search from the start of file.
If '' is a regex, it will search
starting at the line given by ''.
+
- +offset or -offset
+
This is only valid for '' and will specify a number
of lines before or after the line given by ''.
+
If `:` is given in place of '' and '', it is a
regular expression that denotes the range from the first funcname line
that matches '', up to the next funcname line. `:`
searches from the end of the previous `-L` range, if any, otherwise
from the start of file. `^:` searches from the start of
file. The function names are determined in the same way as `git diff`
works out patch hunk headers (see 'Defining a custom hunk-header'
in linkgit:gitattributes[5]).