chore: re-format with Prettier

Related to c8aa058ede

Mainly due to https://prettier.io/blog/2019/06/06/1.18.0.html#stop-breaking-simple-template-literals-5979-by-jwbay

packages/xo-server-load-balancer/src/density-plan.js

@@ -189,9 +189,7 @@ export default class DensityPlan extends Plan {
         const { vm, destination } = move
         const xapiDest = this.xo.getXapi(destination)
         debug(
-          `Migrate VM (${vm.id}) to Host (${destination.id}) from Host (${
-            vm.$container
-          }).`
+          `Migrate VM (${vm.id}) to Host (${destination.id}) from Host (${vm.$container}).`
         )
         return xapiDest.migrateVm(
           vm._xapiId,

packages/xo-server-load-balancer/src/performance-plan.js

@@ -126,9 +126,7 @@ export default class PerformancePlan extends Plan {
       destinationAverages.memoryFree -= vmAverages.memory
 
       debug(
-        `Migrate VM (${vm.id}) to Host (${destination.id}) from Host (${
-          exceededHost.id
-        }).`
+        `Migrate VM (${vm.id}) to Host (${destination.id}) from Host (${exceededHost.id}).`
       )
       optimizationsCount++
 
@@ -143,9 +141,7 @@ export default class PerformancePlan extends Plan {
 
     await Promise.all(promises)
     debug(
-      `Performance mode: ${optimizationsCount} optimizations for Host (${
-        exceededHost.id
-      }).`
+      `Performance mode: ${optimizationsCount} optimizations for Host (${exceededHost.id}).`
     )
   }
 }