Update history, fixed a broken unit test for Help

HISTORY.md

@@ -1,6 +1,11 @@
 # History
 
 
+## not yet released, version 3.16.4
+
+- Fixed many small issues in the embedded docs.  Thanks @Schnark.
+
+
 ## 2017-08-28, version 3.16.3
 
 - Fixed #934: Wrong simplification of unary minus. Thanks @firepick1.

lib/expression/Help.js

@@ -62,12 +62,13 @@ function factory (type, config, load, typed) {
 
         var res;
         try {
+          // note: res can be undefined when `expr` is an empty string
           res = parser.eval(expr);
         }
         catch (e) {
           res = e;
         }
-        if (!type.isHelp(res)) {
+        if (res !== undefined && !type.isHelp(res)) {
           desc += '        ' + string.format(res, {precision: 14}) + '\n';
         }
       }

package.json

@@ -39,6 +39,7 @@
     "Mathias Polligkeit (https://github.com/woylie)",
     "Max Bruckner (https://github.com/FSMaxB)",
     "Maxence Dalmais (https://github.com/maxired)",
+    "Michael M. (https://github.com/Schnark)",
     "Mitchel Kelonye (https://github.com/kelonye)",
     "mtraynham (https://github.com/mtraynham)",
     "Niels Heisterkamp (https://github.com/nheisterkamp)",