improvements in API docs generation

src/share/shaca/entities/sbranch.js

@@ -38,17 +38,17 @@ class SBranch extends AbstractShacaEntity {
         this.shaca.childParentToBranch[`${this.noteId}-${this.parentNoteId}`] = this;
     }
 
-    /** @return {SNote} */
+    /** @returns {SNote} */
     get childNote() {
         return this.shaca.notes[this.noteId];
     }
 
-    /** @return {SNote} */
+    /** @returns {SNote} */
     getNote() {
         return this.childNote;
     }
 
-    /** @return {SNote} */
+    /** @returns {SNote} */
     get parentNote() {
         return this.shaca.notes[this.parentNoteId];
     }

src/share/shaca/entities/snote.js

@@ -200,7 +200,7 @@ class SNote extends AbstractShacaEntity {
         return this.__attributeCache;
     }
 
-    /** @return {SAttribute[]} */
+    /** @returns {SAttribute[]} */
     __getInheritableAttributes(path) {
         if (path.includes(this.noteId)) {
             return [];