Apply suggestions from code review

Co-authored-by: Mateusz Dahlke <39696234+Xavrax@users.noreply.github.com>

config.go

@@ -51,7 +51,7 @@ type Config struct {
 	StoreTokensOnGrant            bool                // Will store grant v3 tokens in token manager for further use.
 	FileMessagePublishRetryLimit  int                 // The number of tries made in case of Publish File Message failure.
 	UseRandomInitializationVector bool                // When true the IV will be random for all requests and not just file upload. When false the IV will be hardcoded for all requests except File Upload
-	CryptoModule                  crypto.CryptoModule //a cryptography module used for encryption and decryption
+	CryptoModule                  crypto.CryptoModule // A cryptography module used for encryption and decryption
 }
 
 // NewDemoConfig initiates the config with demo keys, for tests only.

crypto/encrypting_reader.go

@@ -70,7 +70,7 @@ func (encryptingReader *blockModeEncryptingReader) Read(p []byte) (n int, err er
 		return 0, errors.New("cannot read into empty buffer")
 	}
 
-	if (encryptingReader.err != nil) && encryptingReader.buffer.Len() == 0 {
+	if encryptingReader.err != nil && encryptingReader.buffer.Len() == 0 {
 		return 0, encryptingReader.err
 	}