Fix to match GHs algorithm 1

Related to GH-5.
Related to GH-6.

html.js

@@ -20,8 +20,9 @@ function literalAutolinkHttp(token) {
 
 function anchorFromToken(token, protocol) {
   var url = this.sliceSerialize(token)
-  var href = this.encode(normalizeUri(url))
-  this.tag('<a href="' + (protocol || '') + href + '">')
+  this.tag(
+    '<a href="' + this.encode(normalizeUri((protocol || '') + url)) + '">'
+  )
   this.raw(this.encode(url))
   this.tag('</a>')
 }

package.json

@@ -31,7 +31,7 @@
     "syntax.js"
   ],
   "dependencies": {
-    "micromark": "~2.11.0"
+    "micromark": "~2.11.3"
   },
   "devDependencies": {
     "nyc": "^15.0.0",

readme.md

@@ -10,7 +10,20 @@
 
 **[micromark][]** extension to support GitHub flavored markdown [literal
 autolinks][].
-This syntax extension matches the GFM spec and github.com.
+
+This syntax extension matches the GFM spec and how literal autolinks work
+in several places on github.com.
+Do note that GH employs two algorithms to autolink: one at parse time,
+one at compile time (similar to how @mentions are done at compile time).
+This difference can be observed because character references and escapes
+are handled differently.
+But also because issues/PRs/comments omit (perhaps by accident?) the second
+algorithm for `www.`, `http://`, and `https://` links (but not for email links).
+
+As this is a syntax extension, it focuses on the first algorithm.
+The `html` part of this extension does not operate on an AST and hence can’t
+perform the second algorithm.
+`mdast-util-gfm-autolink-literal` adds support for the second.
 
 This package provides the low-level modules for integrating with the micromark
 tokenizer and the micromark HTML compiler.