General ⇒ Why percent signs at the end of lines?

[dl3fo3]

Some LaTeX codes I've seen have percent signs at the end of some lines. What does it do?

Here's an example in the KOMA-Script manual (look at the end of the second line).

Code: Select all

\makeatletter
\renewcommand*{\rightmark}{%
  \expandafter\@rightmark\botmark\@empty\@empty}
\makeatother

[nlct]

It comments out the end of line character to prevent an unwanted space.

Regards
Nicola Talbot