node-pty proper import

terminus-terminal/src/bufferizedPTY.js

@@ -2,7 +2,7 @@
 module.exports = function patchPTYModule (mod) {
   const oldSpawn = mod.spawn
   if (mod.patched) {
-    return mod
+    return
   }
   mod.patched = true
   mod.spawn = (file, args, opt) => {
@@ -51,5 +51,4 @@ module.exports = function patchPTYModule (mod) {
     })
     return terminal
   }
-  return mod
 }

terminus-terminal/src/services/sessions.service.ts

 import psNode = require('ps-node')
-let nodePTY
 import * as fs from 'mz/fs'
 import * as os from 'os'
+import * as nodePTY from 'node-pty'
+
 import { Observable, Subject } from 'rxjs'
 import { first } from 'rxjs/operators'
 import { Injectable } from '@angular/core'
@@ -322,8 +323,7 @@ export class SessionsService {
     constructor (
         log: LogService,
     ) {
-        nodePTY = require('node-pty')
-        nodePTY = require('../bufferizedPTY')(nodePTY)
+        require('../bufferizedPTY')(nodePTY)
         this.logger = log.create('sessions')
     }