We do not need a separate check forbidding whitespace
after the opening parenthesis after a keyword -
we forbid it after all of them.
The only allowed whitespace after an opening parenthesis
is a newline, tune the regex to reflect that.
Instead of matching multiple characters before the parenthesis,
only check for a single whitespace, which is much less cpu-intensive.
This only matches a few dozen of places where they are on an separate
line, filter out those with a separate regex.
