add optional current route param to toURL and use it to properly compose local anchor links

src/core/render/compiler.js

@@ -82,7 +82,7 @@ renderer.code = function (code, lang = '') {
 renderer.link = function (href, title, text) {
   let blank = ''
   if (!/:|(\/{2})/.test(href)) {
-    href = toURL(href)
+    href = toURL(href, null, currentPath)
   } else {
     blank = ' target="_blank"'
   }

src/core/route/hash.js

@@ -64,16 +64,17 @@ export function parse (path = window.location.href) {
  * to URL
  * @param  {string} path
  * @param  {object} qs   query params
+ * @param  {string} currentRoute optional current route
  */
-export function toURL (path, params) {
-  const inline = path[0] === '#'
+export function toURL (path, params, currentRoute) {
+  const local = currentRoute && path[0] === '#'
   const route = parse(replaceSlug(path))
 
   route.query = merge({}, route.query, params)
   path = route.path + stringifyQuery(route.query)
   path = path.replace(/\.md(\?)|\.md$/, '$1')
 
-  if (inline) path = currentPath + path
+  if (local) path = currentRoute + path
 
   return cleanPath('#/' + path)
 }