Update applyFix to make line ending optional, MD047 to highlight only last character.

helpers/helpers.js

@@ -457,7 +457,7 @@ function applyFix(line, fixInfo, lineEnding) {
   return (deleteCount === -1) ?
     null :
     line.slice(0, editIndex) +
-    insertText.replace(/\n/g, lineEnding) +
+    insertText.replace(/\n/g, lineEnding || "\n") +
     line.slice(editIndex + deleteCount);
 }
 module.exports.applyFix = applyFix;

lib/md047.js

@@ -17,7 +17,7 @@ module.exports = {
         lastLineNumber,
         null,
         null,
-        null,
+        [ lastLine.length, 1 ],
         {
           "insertText": "\n",
           "editColumn": lastLine.length + 1

test/detailed-results-MD041-MD050.results.json

@@ -105,6 +105,6 @@
         "ruleInformation": "https://github.com/DavidAnson/markdownlint/blob/v0.0.0/doc/Rules.md#md047",
         "errorDetail": null,
         "errorContext": null,
-        "errorRange": null
+        "errorRange": [ 25, 1 ]
     }
 ]

test/markdownlint-test.js

@@ -578,7 +578,7 @@ module.exports.resultFormattingV3 = function resultFormattingV3(test) {
           "ruleInformation": `${homepage}/blob/v${version}/doc/Rules.md#md047`,
           "errorDetail": null,
           "errorContext": null,
-          "errorRange": null,
+          "errorRange": [ 15, 1 ],
           "fixInfo": {
             "insertText": "\n",
             "editColumn": 16
@@ -1945,6 +1945,54 @@ module.exports.getPreferredLineEnding = function getPreferredLineEnding(test) {
   test.done();
 };
 
+module.exports.applyFix = function applyFix(test) {
+  test.expect(4);
+  const testCases = [
+    [
+      "Hello world.",
+      {
+        "editColumn": 12,
+        "deleteCount": 1
+      },
+      undefined,
+      "Hello world"
+    ],
+    [
+      "Hello world.",
+      {
+        "editColumn": 13,
+        "insertText": "\n"
+      },
+      undefined,
+      "Hello world.\n"
+    ],
+    [
+      "Hello world.",
+      {
+        "editColumn": 13,
+        "insertText": "\n"
+      },
+      "\n",
+      "Hello world.\n"
+    ],
+    [
+      "Hello world.",
+      {
+        "editColumn": 13,
+        "insertText": "\n"
+      },
+      "\r\n",
+      "Hello world.\r\n"
+    ]
+  ];
+  testCases.forEach((testCase) => {
+    const [ line, fixInfo, lineEnding, expected ] = testCase;
+    const actual = helpers.applyFix(line, fixInfo, lineEnding);
+    test.equal(actual, expected, "Incorrect fix applied.");
+  });
+  test.done();
+};
+
 module.exports.applyFixes = function applyFixes(test) {
   test.expect(28);
   const testCases = [