Regex Tester & Validator

Matches lines that begin with a single digit (0-9) immediately followed by exactly seven spaces. The multiline flag (m) makes the ^ anchor apply at the start of each line, while the global flag (g) allows all matching lines to be found. Useful for parsing fixed-width text files, log entries, or columnar data where the first field is a one-digit number and is padded with spaces for alignment.