CodeMirror is a versatile text editor implemented in JavaScript for the browser. It is specialized for editing code, and comes with a number of language modes and addons that implement more advanced editing functionality […] It is the editor used in the dev tools for both Firefox and Chrome, Light Table, Adobe Brackets, Bitbucket, and many other projects.While the latest version of Brackets still uses an older version of CodeMirror, NSIS support can be installed using the Extension Manager.
CodeMirror adds NSIS support
Just wanted to let you know that as of today, CodeMirror now officially supports NSIS.