Clarified Add method's comments

entry.go

@@ -66,7 +66,8 @@ func NewEntry(title string) *Entry {
 	}
 }
 
-// AddAuthor adds the Person as an author to the Entry. It returns an int.
+// AddAuthor adds the Person as an author to the Entry. It returns its index as
+// an int.
 func (e *Entry) AddAuthor(p *Person) int {
 	e.Updated = NewDate(time.Now())
 	return addToSlice(&e.Authors, p)
@@ -82,7 +83,7 @@ func (e *Entry) DeleteAuthor(index int) error {
 	return nil
 }
 
-// AddCategory adds the Category to the Entry. It returns an int.
+// AddCategory adds the Category to the Entry. It returns ts index as an int.
 func (e *Entry) AddCategory(c *Category) int {
 	e.Updated = NewDate(time.Now())
 	return addToSlice(&e.Categories, c)
@@ -99,8 +100,8 @@ func (e *Entry) DeleteCategory(index int) error {
 	return nil
 }
 
-// AddContributor adds the Person as a contributor to the Entry. It returns an
-// int.
+// AddContributor adds the Person as a contributor to the Entry. It returns its
+// index as an int.
 func (e *Entry) AddContributor(c *Person) int {
 	e.Updated = NewDate(time.Now())
 	return addToSlice(&e.Contributors, c)
@@ -117,7 +118,7 @@ func (e *Entry) DeleteContributor(index int) error {
 	return nil
 }
 
-// AddLink adds the Link to the Entry. It returns an int.
+// AddLink adds the Link to the Entry. It returns its index as an int.
 func (e *Entry) AddLink(l *Link) int {
 	e.Updated = NewDate(time.Now())
 	return addToSlice(&e.Links, l)
@@ -133,7 +134,8 @@ func (e *Entry) DeleteLink(index int) error {
 	return nil
 }
 
-// AddExtension adds the ExtensionElement to the Entry. It returns an int.
+// AddExtension adds the ExtensionElement to the Entry. It returns its index as
+// an int.
 func (e *Entry) AddExtension(x *ExtensionElement) int {
 	e.Updated = NewDate(time.Now())
 	return addToSlice(&e.Extensions, x)