Fixing typos in comments.

PiperOrigin-RevId: 240532901
GitOrigin-RevId: 203cb159742118fcad7438fd335627d6553a3d65

cc/subtle/aes_gcm_hkdf_stream_segment_decrypter.h

@@ -45,7 +45,7 @@ namespace subtle {
 //  - segment_0 is shorter, so that segment_0, the header and other information
 //    of size get_ciphertext_offset() align with get_ciphertext_segment_size().
 //
-// The of the header is
+// The format of the header is
 //   header_size || salt || nonce_prefix
 // where
 //  - header_size is 1 byte determining the size of the header

cc/subtle/aes_gcm_hkdf_stream_segment_encrypter.h

@@ -44,7 +44,7 @@ namespace subtle {
 //  - segment_0 is shorter, so that segment_0, the header and other information
 //    of size get_ciphertext_offset() align with get_ciphertext_segment_size().
 //
-// The of the header is
+// The format of the header is
 //   header_size || salt || nonce_prefix
 // where
 //  - header_size is 1 byte determining the size of the header