refactor: reverse list function finally

cli/app/list.go

@@ -183,9 +183,7 @@ can take some time.
 							stats.latestCount++
 						}
 					} else {
-						for i, j := 0, len(newUpdates)-1; i < j; i, j = i+1, j-1 {
-							newUpdates[i], newUpdates[j] = newUpdates[j], newUpdates[i]
-						}
+						newUpdates = internal.ReverseStringList(newUpdates)
 						appStats.upgrade = strings.Join(newUpdates, "\n")
 						stats.upgradeCount++
 					}

cli/app/rollback.go

@@ -112,9 +112,7 @@ recipes.
 			}
 		}
 
-		for i, j := 0, len(availableDowngrades)-1; i < j; i, j = i+1, j-1 {
-			availableDowngrades[i], availableDowngrades[j] = availableDowngrades[j], availableDowngrades[i]
-		}
+		availableDowngrades = internal.ReverseStringList(availableDowngrades)
 
 		var chosenDowngrade string
 		if !internal.Chaos {

cli/app/upgrade.go

@@ -119,6 +119,8 @@ recipes.
 			}
 		}
 
+		availableUpgrades = internal.ReverseStringList(availableUpgrades)
+
 		var chosenUpgrade string
 		if len(availableUpgrades) > 0 && !internal.Chaos {
 			if internal.Force {

cli/internal/list.go

@@ -0,0 +1,10 @@
+package internal
+
+// ReverseStringList reverses a list of a strings. Roll on Go generics.
+func ReverseStringList(strings []string) []string {
+	for i, j := 0, len(strings)-1; i < j; i, j = i+1, j-1 {
+		strings[i], strings[j] = strings[j], strings[i]
+	}
+
+	return strings
+}