This commit removed parentheses from extracts:
However, the space before the parentheses is not removed, which results in an incorrect space, often directly before punctuation.
For the article "Vappu", which starts:
"Vappu (born August 7), also known as Lexy, Alexis and Alexistar..."
The extract is:
"Vappu , also known as Lexy, Alexis and Alexistar..."
There should not be a space after "Vappu". I think you could do something like "(\s?)" before the rest of the regex to remove this.