fix: remove duplicate binary suggestions (fixes #105)

complete.go

@@ -69,6 +69,8 @@ func binaryComplete(query, ctx string, fields []string) ([]string, string) {
 		}
 	}
 
+	completions = removeDupes(completions)
+
 	return completions, query
 }
 

main.go

@@ -268,3 +268,16 @@ func expandHome(path string) string {
 
 	return strings.Replace(defaultHistDir, "~", homedir, 1)
 }
+
+func removeDupes(slice []string) []string {
+	all := make(map[string]bool)
+	newSlice := []string{}
+	for _, item := range slice {
+		if _, val := all[item]; !val {
+			all[item] = true
+			newSlice = append(newSlice, item)
+		}
+	}
+
+	return newSlice
+}