Documentation typo.

Change-Id: Iedcba0ac15bc14def9c2dc2407ed29d130133c0c
Reviewed-on: https://boringssl-review.googlesource.com/6315
Reviewed-by: Adam Langley <alangley@gmail.com>

include/openssl/ssl.h

diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index 0045284..c2dd336 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -376,7 +376,8 @@
 OPENSSL_EXPORT int SSL_get_quiet_shutdown(const SSL *ssl);
 
 /* SSL_get_error returns a |SSL_ERROR_*| value for the most recent operation on
- * |ssl|. It should be called after an operation failed to determine. */
+ * |ssl|. It should be called after an operation failed to determine whether the
+ * error was fatal and, if not, when to retry. */
 OPENSSL_EXPORT int SSL_get_error(const SSL *ssl, int ret_code);
 
 /* SSL_ERROR_NONE indicates the operation succeeded. */