all: make method and struct comments match the names

Change-Id: I9fd025393acc12da59fdac1c416563324cd26af1
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/639695
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

clientcredentials/clientcredentials.go

@@ -37,7 +37,7 @@ type Config struct {
 	// URL. This is a constant specific to each server.
 	TokenURL string
 
-	// Scope specifies optional requested permissions.
+	// Scopes specifies optional requested permissions.
 	Scopes []string
 
 	// EndpointParams specifies additional parameters for requests to the token endpoint.

google/externalaccount/aws.go

@@ -28,7 +28,7 @@ import (
 
 // AwsSecurityCredentials models AWS security credentials.
 type AwsSecurityCredentials struct {
-	// AccessKeyId is the AWS Access Key ID - Required.
+	// AccessKeyID is the AWS Access Key ID - Required.
 	AccessKeyID string `json:"AccessKeyID"`
 	// SecretAccessKey is the AWS Secret Access Key - Required.
 	SecretAccessKey string `json:"SecretAccessKey"`

google/externalaccount/basecredentials.go

@@ -329,7 +329,7 @@ type SubjectTokenSupplier interface {
 type AwsSecurityCredentialsSupplier interface {
 	// AwsRegion should return the AWS region or an error.
 	AwsRegion(ctx context.Context, options SupplierOptions) (string, error)
-	// GetAwsSecurityCredentials should return a valid set of AwsSecurityCredentials or an error.
+	// AwsSecurityCredentials should return a valid set of AwsSecurityCredentials or an error.
 	// The external account token source does not cache the returned security credentials, so caching
 	// logic should be implemented in the supplier to prevent multiple requests for the same security credentials.
 	AwsSecurityCredentials(ctx context.Context, options SupplierOptions) (*AwsSecurityCredentials, error)

oauth2.go

@@ -56,7 +56,7 @@ type Config struct {
 	// the OAuth flow, after the resource owner's URLs.
 	RedirectURL string
 
-	// Scope specifies optional requested permissions.
+	// Scopes specifies optional requested permissions.
 	Scopes []string
 
 	// authStyleCache caches which auth style to use when Endpoint.AuthStyle is