Account for front matter when calculating range for resultVersion 1 (fixes #48).

lib/markdownlint.js

@@ -255,7 +255,8 @@ function lintContent(content, config, frontMatter, resultVersion) {
               if (typeof regexp === "function") {
                 regexp = regexp(params.options);
               }
-              var match = lines[error.lineNumber - 1].match(regexp);
+              var lineIndex = error.lineNumber - frontMatterLines - 1;
+              var match = lines[lineIndex].match(regexp);
               if (match) {
                 var column = match.index + 1;
                 var length = match[0].length;

test/detailed-results-front-matter.json

@@ -0,0 +1,4 @@
+{
+  "default": true,
+  "MD041": true
+}

test/detailed-results-front-matter.md

@@ -0,0 +1,6 @@
+---
+front: matter
+---
+Text
+
+Text 

test/detailed-results-front-matter.results.json

@@ -0,0 +1,20 @@
+[
+    {
+        "lineNumber": 6,
+        "ruleName": "MD009",
+        "ruleAlias": "no-trailing-spaces",
+        "ruleDescription": "Trailing spaces",
+        "errorDetail": "Expected: 0; Actual: 1",
+        "errorContext": null,
+        "errorRange": [5, 1]
+    },
+    {
+        "lineNumber": 4,
+        "ruleName": "MD041",
+        "ruleAlias": "first-line-h1",
+        "ruleDescription": "First line in file should be a top level header",
+        "errorDetail": null,
+        "errorContext": "Text",
+        "errorRange": null
+    }
+]