regular expressions

- dot character in regex dont include newline character so use this `[\s\S]` instead of `.`.
  eg: `const questionreg = /\.gpt\s+([\s\S]*)/;`
- variables in regex
  ```js
	// variable == 'REGEX'
	
	// to escape special characters like +,.,etc in variable string
	function escapeRegExp(string) {
	  return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
	}

	const variable = <VALUE>
	
	let re = new RegExp(String.raw`\s${variable}\s`, "g");
	```
- word boundary
  to search by word `/\bword\b/` instead of `/word/`