Include function names in pretty printer output

This helps make matcher errors and spy strategy mismatch errors easier
to understand in cases where the difference involves expecting one
function but getting a different one.

src/core/PrettyPrinter.js

@@ -35,7 +35,11 @@ getJasmineRequireObj().makePrettyPrinter = function(j$) {
         } else if (value instanceof RegExp) {
           this.emitScalar(value.toString());
         } else if (typeof value === 'function') {
-          this.emitScalar('Function');
+          if (value.name) {
+            this.emitScalar(`Function '${value.name}'`);
+          } else {
+            this.emitScalar('Function');
+          }
         } else if (j$.isDomNode(value)) {
           if (value.tagName) {
             this.emitDomElement(value);