Improve usability and better output formatting for gosndc

Description

Related Issue

#188 (closed)

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

cli/cmd/prompt.go

@@ -47,8 +47,6 @@ import (
 
 // PromptCompleter provides completion for a device
 type PromptCompleter struct {
-	//NOTE: should be removed
-	deviceID               uuid.UUID
 	yangSchemaCompleterMap map[uuid.UUID]*completer.YangSchemaCompleter
 }
 
@@ -145,18 +143,17 @@ func deviceGetCompletion(c *PromptCompleter, d prompt.Document, inputSplit []str
 		}
 		c.yangSchemaCompleterMap[id] = completer.NewYangSchemaCompleter(schemaTree["Device"], true)
 		if yc, ok := c.yangSchemaCompleterMap[id]; ok {
-			c.deviceID = id
 			return yc.Complete(d)
 		}
 	case 4:
 		if d.GetWordBeforeCursor() == "" || d.GetWordAfterCursor() != "" {
 			return []prompt.Suggest{}
 		}
-		_, err := uuid.Parse(inputSplit[inputLen-2])
+		id, err := uuid.Parse(inputSplit[inputLen-2])
 		if err != nil {
 			return devicePrompt(d)
 		}
-		if yc, ok := c.yangSchemaCompleterMap[c.deviceID]; ok {
+		if yc, ok := c.yangSchemaCompleterMap[id]; ok {
 			return yc.Complete(d)
 		}
 	default: