Preserve initial position in links

fix #55

lib/rules_inline/links.js

@@ -18,6 +18,7 @@ module.exports = function links(state, silent) {
       ref,
       code,
       isImage = false,
+      oldPos = state.pos,
       max = state.posMax,
       start = state.pos,
       marker = state.src.charCodeAt(start);
@@ -86,7 +87,7 @@ module.exports = function links(state, silent) {
     }
 
     if (pos >= max || state.src.charCodeAt(pos) !== 0x29/* ) */) {
-      state.pos = labelStart - 1;
+      state.pos = oldPos;
       return false;
     }
     pos++;
@@ -121,7 +122,7 @@ module.exports = function links(state, silent) {
 
     ref = state.env.references[normalizeReference(label)];
     if (!ref) {
-      state.pos = labelStart - 1;
+      state.pos = oldPos;
       return false;
     }
     href = ref.href;

test/fixtures/remarkable/commonmark_extras.txt

@@ -77,3 +77,13 @@ Link label has priority over emphasis (not covered by stmd tests):
 <p>**<a href="">link**</a></p>
 .
 
+Issue #55:
+
+.
+![test]
+
+![test](foo bar)
+.
+<p>![test]</p>
+<p>![test](foo bar)</p>
+.