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#! /bin/sh
# quoted_strings : lines string |> lines string
# Extract all (double-) quoted strings from stdin.
#
# 0. find begin of string or skip line
# 1. find end of string or skip line
# 2. print string and continue after string
set -euf
sed '
s:[^"]*":: ;t1;d
:1; s:\(\([^"]\|\\"\)*\)":\1\n: ;t2;d
:2; P;D
' \
| sed 's:\\":":g'
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