Remove newlines from error message

Newlines can cause trouble with translations as well as presentation in
the UI. This particular string doesn't actually need the newlines, so
this commit changes it to just not have them.

Alternative to ManageIQ/manageiq#23213

app/models/manageiq/providers/ovirt/infra_manager/vm_or_template_shared/scanning.rb

@@ -51,11 +51,12 @@ def perform_metadata_sync(ost)
     sync_stashed_metadata(ost)
   end
 
-  RHEVM_NO_PROXIES_ERROR_MSG = N_('VMs must be scanned from an EVM server whose host is attached to the same
-  storage as the VM unless overridden via SmartProxy affinity.
-  Please verify that:
-  1) Direct LUNs are attached to ManageIQ appliance
-  2) Management Relationship is set for the ManageIQ appliance')
+  RHEVM_NO_PROXIES_ERROR_MSG = N_(
+    "VMs must be scanned from an appliances whose host is attached to the same " \
+    "storage as the VM unless overridden via SmartProxy affinity. Please verify " \
+    "that direct LUNs are attached to the appliance and that the management " \
+    "relationship is set for the appliance."
+  )
 
   def proxies4job(_job = nil)
     _log.debug "Enter (RHEVM)"