Bug 434194: [painting] "Show whitespace character" option makes the editor slow if there are many spaces

Space characters (and their visible place holders) are drawn with a
single call, not separately, if they are all of the same width.

Change-Id: Ibfbcfe216cb8f7117180d5b530ebdf39ff81c164
Signed-off-by: John Hendrikx <hjohn@xs4all.nl>
1 file changed