Don't allow escaped spaces in link destination.

Closes commonmark/commonmark-spec#493.
commonmark · Mar 25, 2018 · f0da145 · f0da145
1 parent 691fc67
commit f0da145
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diff --git a/lib/inlines.js b/lib/inlines.js
@@ -485,7 +485,8 @@ var parseLinkDestination = function() {
         var openparens = 0;
         var c;
         while ((c = this.peek()) !== -1) {
-            if (c === C_BACKSLASH) {
+            if (c === C_BACKSLASH
+                && reEscapable.test(this.subject.charAt(this.pos + 1))) {
                 this.pos += 1;
                 if (this.peek() !== -1) {
                     this.pos += 1;

diff --git a/test/regression.txt b/test/regression.txt
@@ -94,3 +94,11 @@ Issue #116 - tabs before and after ATX closing heading
 .
 <h1>foo</h1>
 ````````````````````````````````
+
+commonmark/CommonMark#493 - escaped space not allowed in link
+destination.
+```````````````````````````````` example
+[link](a\ b)
+.
+<p>[link](a\ b)</p>
+````````````````````````````````