fix a number of minor typos

Fix 19 typos, grammatical errors and duplicated words.

These fixes have minimal impact on the code as these are either in the
doc files or in comments inside the code files.

Signed-off-by: Abdur Rehman <abdur_rehman@mentor.com>

cli/trust/trust.go

@@ -299,7 +299,7 @@ type ImageRefAndAuth struct {
 }
 
 // GetImageReferencesAndAuth retrieves the necessary reference and auth information for an image name
-// as a ImageRefAndAuth struct
+// as an ImageRefAndAuth struct
 func GetImageReferencesAndAuth(ctx context.Context, authResolver func(ctx context.Context, index *registrytypes.IndexInfo) types.AuthConfig, imgName string) (ImageRefAndAuth, error) {
 	ref, err := reference.ParseNormalizedNamed(imgName)
 	if err != nil {