Fix hard-break-spaces in indented blocks

Closes GH-31.

lib/rules/hard-break-spaces.js

@@ -43,12 +43,15 @@ function hardBreakSpaces(ast, file, preferred, done) {
     visit(ast, 'break', function (node) {
         var start = position.start(node).offset;
         var end = position.end(node).offset;
+        var value;
 
         if (position.generated(node)) {
             return;
         }
 
-        if (contents.slice(start, end).length > 3) {
+        value = contents.slice(start, end).split('\n', 1)[0];
+
+        if (value.length > 2) {
             file.warn('Use two spaces for hard line breaks', node);
         }
     });

test/fixtures/hard-break-spaces-invalid.md

@@ -1,5 +1,8 @@
 Here’s one that uses too   
 much white space.
 
+-   A bullet with three trailing spaces   
+    Next line.
+
 And here’s a commonmark\
 break.

test/fixtures/hard-break-spaces-valid.md

@@ -1,5 +1,8 @@
 Here’s one that uses too  
 just enough white space.
 
+-   A bullet with two trailing spaces  
+    Next line.
+
 And here’s another  
 break.

test/index.js

@@ -1214,7 +1214,8 @@ describe('Rules', function () {
     describeRule('hard-break-spaces', function () {
         describeSetting(true, function () {
             assertFile('hard-break-spaces-invalid.md', [
-                'hard-break-spaces-invalid.md:1:25-2:1: Use two spaces for hard line breaks'
+                'hard-break-spaces-invalid.md:1:25-2:1: Use two spaces for hard line breaks',
+                'hard-break-spaces-invalid.md:4:40-5:5: Use two spaces for hard line breaks'
             ]);
 
             assertFile('hard-break-spaces-valid.md', []);