Add support for the Fd macro

src/macros/doc.js

@@ -1492,6 +1492,23 @@ macros.doc = {
     return macros.doc.Fn.call(this, callParams);
   },
 
+  /**
+   * Preprocessor directive, in particular for listing it in the SYNOPSIS.
+   *
+   * @argument {string} args.name preprocessor directive
+   *
+   * @returns {string}
+   *
+   * @since 0.0.1
+   *
+   */
+  Fd: function (args) {
+
+    args = this.parseArguments(args);
+
+    return this.generateTag('strong', args.join(' ')) + '<br>';
+  },
+
   /**
    * Prints the provided text in italics, if its called inside of the
    * SYNOPSIS section it also adds a line break

test/macros/doc/Fd.html

@@ -0,0 +1,8 @@
+<!--
+@it it displays the specified arguments on a separate line
+
+.Fd #ifdef FS_DEBUG
+-->
+
+<strong>#ifdef FS_DEBUG</strong><br>
+