Loadcase -- the literal text Loadcase -- (case sensitive) \d+a digit, repeated at least once
\s+any whitespace character, repeated at least once
.+any character (except for line terminators), repeated at least once
\s{6}any whitespace character, repeated exactly 6 times
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string