Fix typos, grammar and wording in documentation
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 143d4da..a978899 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -11286,7 +11286,7 @@
                               size_t buf_len,
                               size_t *olen )
 {
-    /* Unimplemented yet */
+    /* Unimplemented */
     (void) ssl;
 
     if( buf != NULL )
@@ -11304,7 +11304,7 @@
                               const unsigned char *buf,
                               size_t len )
 {
-    /* Unimplemented yet */
+    /* Unimplemented */
     (void) ssl;
     (void) buf;
     (void) len;