Fix applyFix handling of multiple line endings; MD022 handling of multiple lines.

helpers/helpers.js

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

lib/md022.js

@@ -20,37 +20,41 @@ module.exports = {
     const { lines } = params;
     filterTokens(params, "heading_open", (token) => {
       const [ topIndex, nextIndex ] = token.map;
+      let actualAbove = 0;
       for (let i = 0; i < linesAbove; i++) {
-        if (!isBlankLine(lines[topIndex - i - 1])) {
+        if (isBlankLine(lines[topIndex - i - 1])) {
+          actualAbove++;
+        }
+      }
       addErrorDetailIf(
         onError,
         topIndex + 1,
         linesAbove,
-            i,
+        actualAbove,
         "Above",
         lines[topIndex].trim(),
         null,
         {
-              "insertText": "\n"
+          "insertText": "".padEnd(linesAbove - actualAbove, "\n")
         });
-        }
-      }
+      let actualBelow = 0;
       for (let i = 0; i < linesBelow; i++) {
-        if (!isBlankLine(lines[nextIndex + i])) {
+        if (isBlankLine(lines[nextIndex + i])) {
+          actualBelow++;
+        }
+      }
       addErrorDetailIf(
         onError,
         topIndex + 1,
         linesBelow,
-            i,
+        actualBelow,
         "Below",
         lines[topIndex].trim(),
         null,
         {
           "lineNumber": nextIndex + 1,
-              "insertText": "\n"
+          "insertText": "".padEnd(linesBelow - actualBelow, "\n")
         });
-        }
-      }
     });
   }
 };

test/detailed-results-blanks-around-headings-0-2.md.fixed

@@ -22,5 +22,6 @@ Text
 Elderberry
 ----------
 
+
 Text
 ## Fig

test/detailed-results-blanks-around-headings-3-0.md.fixed

@@ -21,6 +21,7 @@ Text
 Text
 
 
+
 Elderberry
 ----------
 Text

test/markdownlint-test.js

@@ -1946,7 +1946,7 @@ module.exports.getPreferredLineEnding = function getPreferredLineEnding(test) {
 };
 
 module.exports.applyFixes = function applyFixes(test) {
-  test.expect(27);
+  test.expect(28);
   const testCases = [
     [
       "Hello world.",
@@ -2361,6 +2361,19 @@ module.exports.applyFixes = function applyFixes(test) {
         }
       ],
       "Hello\rworld\rhello\rworld\r"
+    ],
+    [
+      "Hello\r\nworld",
+      [
+        {
+          "lineNumber": 2,
+          "fixInfo": {
+            "editColumn": 6,
+            "insertText": "\n\n"
+          }
+        }
+      ],
+      "Hello\r\nworld\r\n\r\n"
     ]
   ];
   testCases.forEach((testCase) => {