style: fix some code style issues

Author: niinpatel

src/mfs.js

@@ -21,7 +21,7 @@ module.exports = function (options) {
   }
 
   store.createWriteStream = function (opts, cb) {
-    if (typeof opts === 'string') opts = {key: opts}
+    if (typeof opts === 'string') opts = { key: opts }
     if (opts.name) opts.key = opts.name
     if (!cb) cb = noop
 
@@ -54,7 +54,7 @@ module.exports = function (options) {
   }
 
   store.createReadStream = function (opts) {
-    if (typeof opts === 'string') opts = {key: opts}
+    if (typeof opts === 'string') opts = { key: opts }
     if (opts.name) opts.key = opts.name
 
     const readPath = normalisePath(store.baseDir + opts.key)
@@ -72,7 +72,7 @@ module.exports = function (options) {
   }
 
   store.exists = function (opts, cb) {
-    if (typeof opts === 'string') opts = {key: opts}
+    if (typeof opts === 'string') opts = { key: opts }
     if (opts.name) opts.key = opts.name
     if (!cb) cb = noop
 
@@ -93,7 +93,7 @@ module.exports = function (options) {
   }
 
   store.remove = function (opts, cb) {
-    if (typeof opts === 'string') opts = {key: opts}
+    if (typeof opts === 'string') opts = { key: opts }
     if (opts.name) opts.key = opts.name
     if (!cb) cb = noop