do not pretty-print package-lock.json to prevent corrupting git lines count history

Author: bl00mber

lib/shrinkwrap.js

@@ -270,11 +270,18 @@ function checkPackageFile (dir, name) {
   return readFile(
     file, 'utf8'
   ).then((data) => {
+    if (name === PKGLOCK) {
+      const indent = 0
+      const newline = 0
+    } else {
+      const indent = detectIndent(data).indent
+      const newline = detectNewline(data)
+    }
     return {
       path: file,
       raw: data,
-      indent: detectIndent(data).indent,
-      newline: detectNewline(data)
+      indent,
+      newline
     }
   }).catch({code: 'ENOENT'}, () => {})
 }