Recommend double quotes

README.md

@@ -253,6 +253,7 @@ If you're writing small CommonJS modules, you typically won't need to have any t
 Many npm scripts depend on Unix-only or bash-only features. If you want to make sure your scripts are platform-independent, keep these in mind:
 
 * Only use cross-shell operators: `>`, `>>`, `<`, `|`, `&&` and `||`. They work in POSIX-compliant shells (bash, sh, zsh) and Windows Command Prompt. You can use tools like [concurrently](https://www.npmjs.com/package/concurrently) to run commands sequentially or in parallel.
+* Avoid single quotes (`'`). Use escaped double quotes (`\"`) instead.
 * Instead of platform-specific tools, use node modules with a CLI – for example [`mkdirp`](https://www.npmjs.com/package/mkdirp) instead of `mkdir`, [`cpy`](https://www.npmjs.com/package/cpy) instead of `cp`, [`mve`](https://www.npmjs.com/package/mve) instead of `mv`, or [`rimraf`](https://www.npmjs.com/package/rimraf) instead of `rm`
 
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