Allow links to other markdown pages of the form [link text](page.md)

doc/markdown.doc

@@ -449,7 +449,7 @@ If a page has a label you can link to it using \ref cmdref "\@ref" as
 is shown above. To refer to a markdown page without
 such label you can simple use the file name of the page, e.g.
 
-    See [the other page](@ref other.md) for more info.
+    See [the other page](other.md) for more info.
 
 \subsection md_html_blocks Treatment of HTML blocks
 

src/markdown.cpp

@@ -850,9 +850,15 @@ static int processLink(GrowBuf &out,const char *data,int,int size)
   }
   else
   {
-    if (link.find("@ref ")!=-1 || link.find("\\ref ")!=-1) 
+    SrcLangExt lang = getLanguageFromFileName(link);
+    int lp=-1;
+    if ((lp=link.find("@ref "))!=-1 || (lp=link.find("\\ref "))!=-1 || lang==SrcLangExt_Markdown) 
         // assume doxygen symbol link
     {
+      if (lp==-1) // link to markdown page
+      {
+        out.addStr("@ref ");
+      }
       out.addStr(link);
       out.addStr(" \"");
       if (explicitTitle && !title.isEmpty())