Documentation/email-clients.txt: remove trailing whitespace
Documentation/email-clients.txt: remove trailing whitespace

Signed-off-by: Luis de Bethencourt <8f75b4f0fcf50ddef066e07e72bb1ea01e2b9de1@osg.samsung.com>
Signed-off-by: Jonathan Corbet <b2ce64d5587c02f12e367eac59751145a0660c51@lwn.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs