Represent strings in raw.

slapos/grid/slapgrid.py

@@ -573,11 +573,11 @@ class Slapgrid(object):
 
         if process_handler.poll() is None:
           process_handler.kill()
-          computer_partition.error("The promise '%s' timed out" % promise)
+          computer_partition.error("The promise %r timed out" % promise)
         elif process_handler.returncode != 0:
           stderr = process_handler.communicate()[1]
           if stderr is None:
-            stderr = 'No error output from %s.' % promise
+            stderr = 'No error output from %r.' % promise
           computer_partition.error(stderr)