Modify comment syntax error (#2572)

tools/goctl/util/console/console.go

@@ -115,7 +115,7 @@ func (c *colorConsole) Must(err error) {
 	}
 }
 
-// NewIdeaConsole returns a instance of ideaConsole
+// NewIdeaConsole returns an instance of ideaConsole
 func NewIdeaConsole() Console {
 	return &ideaConsole{}
 }

tools/goctl/util/templatex.go

@@ -19,7 +19,7 @@ type DefaultTemplate struct {
 	goFmt bool
 }
 
-// With returns a instance of DefaultTemplate
+// With returns an instance of DefaultTemplate
 func With(name string) *DefaultTemplate {
 	return &DefaultTemplate{
 		name: name,