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-#! /bin/sed -nf
-# Script to add @group...@end group tags to sed.texi.in
-# so that comments are not separated from the instructions
-# that they refer to.
-
-# Step 1: search for the conventional "@c start----" comment
-1a\
-@c Do not edit this file!! It is automatically generated from sed-in.texi.
-p
-/^@c start-*$/! b
-
-# Step 2: loop until we find a @ command
-:a
-n
-p
-/^@/! ba
-
-# Step 3: process everything until a "@end" command
-
-# Step 3.1: Print the blank lines before the group. If we reach the "@end",
-# we go back to step 1.
-:b
-n
-/^@end/ {
- p
- b
-}
-/^[ ]*$/ {
- p
- bb
-}
-
-# Step 3.2: Add to hold space every line until an empty one or "@end"
-h
-:c
-n
-/^@end example/! {
- /^[ ]*$/! {
- H
- bc
- }
-}
-
-# Step 3.3: Working in hold space, add @group...@end group if there are
-# at least two lines. Then print the lines we processed and
-# switch back to pattern space.
-x
-/\n/ {
- s/.*/@group\
-&\
-@end group/
-}
-p
-
-# Step 3.4: Switch back to pattern space, print the first blank line
-# and possibly go back to step 3.1
-x
-p
-/^@end/ !bb