Fix a bundle of trailing spaces in several files

Signed-off-by: Paul Yang <paulyang.inf@gmail.com>

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Ben Kaduk <kaduk@mit.edu>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3622)
diff --git a/test/testutil.h b/test/testutil.h
index 48c4eb3..0975e2b 100644
--- a/test/testutil.h
+++ b/test/testutil.h
@@ -434,7 +434,7 @@
 
 /*
  * Read a stanza from the test file.  A stanza consists of a block
- * of lines of the form 
+ * of lines of the form
  *      key = value
  * The block is terminated by EOF or a blank line.
  * Return 1 if found, 0 on EOF or error.