Fix an improperly escaped string
Fix an improperly escaped string

Mark a string representing a "sed" command including a regular expression as a
raw string, so that the entire escaping is performed by "sed" itself.

Signed-off-by: Michele Tartara <05f7077a2c6cbbdc4af4ba42e3ef89a0df846179@google.com>
Reviewed-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>

onponomarev/ganeti,grnet/snf-ganeti,bitemyapp/ganeti,leshchevds/ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,bitemyapp/ganeti,apyrgio/snf-ganeti,andir/ganeti,dimara/ganeti,yiannist/ganeti,ganeti-github-testing/ganeti-test-1,apyrgio/snf-ganeti,mbakke/ganeti,mbakke/ganeti,apyrgio/ganeti,andir/ganeti,grnet/snf-ganeti,ganeti/ganeti,yiannist/ganeti,onponomarev/ganeti,dimara/ganeti,leshchevds/ganeti,ganeti/ganeti,leshchevds/ganeti,yiannist/ganeti,ganeti/ganeti,apyrgio/ganeti,mbakke/ganeti