Build, test, and debug regular expressions
Matches and captures any text at the end of a line, then a literal newline character, followed by a second capture group of zero or more digits at the start of the next line. With the global and multiline flags, it finds all such occurrences across a multi-line string. Commonly used for parsing structured text where labels or headers are followed by numeric values on the next line, such as logs, reports, or command output with text-number pairs.