Remove a stray space

Change-Id: Ic10c84db014692f4bbb04a7997c74662f9bac38a
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/91747
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Lily Chen <chlily@google.com>
Auto-Submit: David Benjamin <davidben@google.com>
Commit-Queue: Lily Chen <chlily@google.com>

include/openssl/evp.h

diff --git a/include/openssl/evp.h b/include/openssl/evp.h
index a437550..7611d1f 100644
--- a/include/openssl/evp.h
+++ b/include/openssl/evp.h
@@ -771,7 +771,7 @@
 // signature. The actual signature may be smaller.
 //
 // It returns one on success or zero on error. (Note: this differs from
-// OpenSSL, which can also return negative values to indicate an error. )
+// OpenSSL, which can also return negative values to indicate an error.)
 OPENSSL_EXPORT int EVP_PKEY_sign(EVP_PKEY_CTX *ctx, uint8_t *sig,
                                  size_t *sig_len, const uint8_t *digest,
                                  size_t digest_len);