Regex Tester & Validator

This regular expression matches entire lines that begin with one or more word characters (letters, numbers, or underscores) followed by a space and an ampersand (` &`). It captures the whole line, making it useful for parsing specific log formats, configuration files, or custom data structures where entries are denoted by an ampersand separator. Using the global (`g`) and multiline (`m`) flags ensures it successfully finds all matching lines throughout a larger block of text.