Fix bug in MD039 where links with markup could trigger incorrectly.

lib/rules.js

@@ -742,15 +742,26 @@ module.exports = [
       filterTokens(params.tokens, "inline")
         .forEach(function forToken(token) {
           var inLink = false;
+          var index = 0;
+          var lastChildRightSpaceLineNumber = 0;
           token.children.forEach(function forChild(child) {
             if (child.type === "link_open") {
               inLink = true;
+              index = 0;
             } else if (child.type === "link_close") {
               inLink = false;
-            } else if ((child.type === "text") &&
+              if (lastChildRightSpaceLineNumber) {
-                       inLink &&
+                errors.push(lastChildRightSpaceLineNumber);
-                       (child.content.trim().length !== child.content.length)) {
+              }
-              errors.push(child.lineNumber);
+            } else if (inLink) {
+              if ((index === 0) &&
+                  (child.content.trimLeft().length !== child.content.length)) {
+                errors.push(child.lineNumber);
+              }
+              lastChildRightSpaceLineNumber =
+                (child.content.trimRight().length !== child.content.length) ?
+                  child.lineNumber : 0;
+              index++;
             }
           });
         });

test/links-with-markup.md

@@ -0,0 +1,15 @@
+[This link is plain](link)
+
+[This link has `code`](link)
+
+[This link has *some* emphasis](link)
+
+[This link has **more** emphasis](link)
+
+[This link has `code` and right space ](link) {MD039}
+
+[ This link has _emphasis_ and left space](link) {MD039}
+
+[This](link) line has [multiple](link) links.
+
+[This](line) does [too ](link) and one has a [space](link) {MD039}