Fix plain report formatting

Author: evgenyz

output/plain.go

@@ -2,14 +2,16 @@ package output
 
 import (
 	"io"
+	"text/tabwriter"
 )
 
 func NewPlainWriter(buf io.Writer) (*TemplateWriter, error) {
 	tfb, err := templates.ReadFile("templates/plain.tpl")
 	if err != nil {
 		return nil, err
 	}
-	tw, err := NewTemplateWriter(buf, string(tfb))
+	w := tabwriter.NewWriter(buf, 0, 0, 1, ' ', 0)
+	tw, err := NewTemplateWriter(w, string(tfb))
 	if err != nil {
 		return nil, err
 	}

output/templates/plain.tpl

@@ -1,9 +1,9 @@
 {{- define "ok" -}}
-OK
+No CVEs found.
 {{end}}
 {{- define "found" -}}
 {{with $r := .}}{{range $id, $v := .PackageVulnerabilities}}{{range $d := $v -}}
-Found	{{with index $r.Packages $id}}{{.Name}}	{{.Version}}{{end}}
+{{with index $r.Packages $id}}{{.Name}}	{{.Version}}{{end}}
 	{{- with index $r.Vulnerabilities $d}}	{{.Name}}
 	{{- with .FixedInVersion}}	(fixed: {{.}}){{end}}{{end}}
 {{end}}{{end}}{{end}}{{end}}