When using line numbers with table style, the border radius for the
corresponding codeblocks leads to annoying gaps between the line numbers
and the actual code.
This commit removes the border radius when the corresponding element is
displayed inside a table (which is the case when line numbers are used
with table format).
Many of the CSS files had no semicolon after the last rule in a block,
which is proper syntax, but it's annoying when adding more rules. Since
omitting the semicolons doesn't really have a benefit, I've decided to
add them.
