Regular Expressions 101

^start of line

Group 1([^;]+)

Negated Character Class[^;]+

+matches at least one character outside the set below:

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

\s*any whitespace character, repeated any number of times

$end of line

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^([^;]+);\s*$

New

Test;Something
should be correct;
this one could be correct with some spaces after;  
Ok;
Not ok; --nothing to do here
Is this ok without the semicolon?
^-- Probably not;
;
^-- What about a line just with a semicolon?;
This char ";" is not allowed!;