build(aio): simplify the primary overload's anchor

The primary link to a member should simply be its name, and not require
the parameter list.

aio/tools/transforms/angular-api-package/index.js

@@ -24,6 +24,7 @@ module.exports = new Package('angular-api', [basePackage, typeScriptPackage])
   .processor(require('./processors/markBarredODocsAsPrivate'))
   .processor(require('./processors/filterPrivateDocs'))
   .processor(require('./processors/computeSearchTitle'))
+  .processor(require('./processors/simplifyMemberAnchors'))
 
   // Where do we get the source files?
   .config(function(readTypeScriptModules, readFilesProcessor, collectExamples) {

aio/tools/transforms/angular-api-package/processors/simplifyMemberAnchors.js

@@ -0,0 +1,26 @@
+/**
+ * Members that have overloads get long unwieldy anchors because they must be distinguished
+ * by their parameter lists.
+ * But the primary overload doesn't not need this distinction, so can just be the name of the member.
+ */
+module.exports = function simplifyMemberAnchors() {
+  return {
+    $runAfter: ['extra-docs-added'],
+    $runBefore: ['computing-paths'],
+    $process: function(docs) {
+      return docs.forEach(doc => {
+        if (doc.members) {
+          doc.members.forEach(member => member.anchor = computeAnchor(member));
+        }
+        if (doc.statics) {
+          doc.statics.forEach(member => member.anchor = computeAnchor(member));
+        }
+      });
+    }
+  };
+};
+
+function computeAnchor(member) {
+  // if the member is a "call" type then it has no name
+  return encodeURI(member.name.trim() || 'call');
+}