Fix: Add representation for \r to showInvisibles (#100)

Author: BPScott

eslint-plugin-prettier.js

@@ -100,6 +100,9 @@ function showInvisibles(str) {
       case '\t':
         ret += '↹'; // Left Arrow To Bar Over Right Arrow To Bar, \u21b9
         break;
+      case '\r':
+        ret += '␍'; // Carriage Return Symbol, \u240D
+        break;
       default:
         ret += str[i];
         break;

test/prettier.js

@@ -110,6 +110,15 @@ vueRuleTester.run('prettier', rule, {
   ]
 });
 
+describe('showInvisibles', () => {
+  it('shows invisibles', () => {
+    assert.equal(
+      eslintPluginPrettier.showInvisibles('1 2\n3\t4\r5'),
+      '1·2⏎3↹4␍5'
+    );
+  });
+});
+
 describe('generateDifferences', () => {
   it('operation: insert', () => {
     const differences = eslintPluginPrettier.generateDifferences(