After the optional word designator, you can add a sequence of one or more
of the following modifiers, each preceded by a :
.
h
t
r
.
suffix
, leaving
the basename.
e
p
s/
old/
new/
/
.
The delimiter may be quoted in old and new
with a single backslash. If &
appears in new,
it is replaced by old. A single backslash will quote
the &
. The final delimiter is optional if it is the last
character on the input line.
&
g
s
, as in gs/
old/
new/
,
or with &
.