whymb: Prevent line breaks between 'membar' and '#Sync', etc.

These instruction variants are easier to recognize with quotation
marks. Use \qco{} for them.

Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
1 file changed