/usr/share/javascript/dojox/io/ is in libjs-dojo-dojox 1.7.2+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/javascript/dojox/io/OAuth.js
/usr/share/javascript/dojox/io/OAuth.js.uncompressed.js
/usr/share/javascript/dojox/io/README
/usr/share/javascript/dojox/io/httpParse.js
/usr/share/javascript/dojox/io/httpParse.js.uncompressed.js
/usr/share/javascript/dojox/io/proxy/
/usr/share/javascript/dojox/io/proxy/README
/usr/share/javascript/dojox/io/proxy/xip.js
/usr/share/javascript/dojox/io/proxy/xip.js.uncompressed.js
/usr/share/javascript/dojox/io/proxy/xip_client.html
/usr/share/javascript/dojox/io/proxy/xip_server.html
/usr/share/javascript/dojox/io/scriptFrame.js
/usr/share/javascript/dojox/io/scriptFrame.js.uncompressed.js
/usr/share/javascript/dojox/io/windowName.js
/usr/share/javascript/dojox/io/windowName.js.uncompressed.js
/usr/share/javascript/dojox/io/xhrMultiPart.js
/usr/share/javascript/dojox/io/xhrMultiPart.js.uncompressed.js
/usr/share/javascript/dojox/io/xhrPlugins.js
/usr/share/javascript/dojox/io/xhrPlugins.js.uncompressed.js
/usr/share/javascript/dojox/io/xhrScriptPlugin.js
/usr/share/javascript/dojox/io/xhrScriptPlugin.js.uncompressed.js
/usr/share/javascript/dojox/io/xhrWindowNamePlugin.js
/usr/share/javascript/dojox/io/xhrWindowNamePlugin.js.uncompressed.js