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diff --git a/Master/texmf-dist/doc/support/cluttex/src/texrunner/shellutil_windows.lua b/Master/texmf-dist/doc/support/cluttex/src/texrunner/shellutil_windows.lua
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index 00000000000..cd0cc11fe9d
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+++ b/Master/texmf-dist/doc/support/cluttex/src/texrunner/shellutil_windows.lua
@@ -0,0 +1,35 @@
+--[[
+ Copyright 2016 ARATA Mizuki
+
+ This file is part of ClutTeX.
+
+ ClutTeX is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ ClutTeX is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with ClutTeX. If not, see <http://www.gnu.org/licenses/>.
+]]
+
+local string_gsub = string.gsub
+
+-- s: string
+local function escape(s)
+ return '"' .. string_gsub(string_gsub(s, '(\\*)"', '%1%1\\"'), '(\\+)$', '%1%1') .. '"'
+end
+
+-- TEST CODE
+assert(escape([[Hello world!]]) == [["Hello world!"]])
+assert(escape([[Hello" world!]]) == [["Hello\" world!"]])
+assert(escape([[Hello\" world!"]]) == [["Hello\\\" world!\""]])
+-- END TEST CODE
+
+return {
+ escape = escape,
+}