Test, validate and match regular expressions
Matches text enclosed in double curly braces, such as {{variable_name}}, non-greedily capturing the content between them. The lazy quantifier ensures each match stops at the first closing braces, while the global flag finds all occurrences throughout the input. Commonly used in template engines like Mustache, Handlebars, and Jinja2 to detect placeholders for variable interpolation or tag substitution.