(?m)applies the following effective flags to the remainder of the pattern: m m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string
?repeats the group contents below at most once:
ERRORthe literal text ERROR (case sensitive) Negated Character Class[^\n]* *matches any number of characters outside the set below:
\na line-feed (newline) character (ASCII 10)
Non-Capturing Group(?:.|\n)*? *?repeats the group contents below any number of times:
.any character (except for line terminators)
\na line-feed (newline) character (ASCII 10)
\d{1,3}a digit, repeated between 1 and 3 times
%the literal % (3710 / 458 / 2516)
,the literal , (4410 / 548 / 2C16)
.*?any character (except for line terminators), repeated any number of times
ETAthe literal text ETA (case sensitive) \sany whitespace character
\da digit
\da digit
.any character (except for line terminators)
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string