Fix some more typos

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Reviewed by:
PR:
diff --git a/apps/dh.c b/apps/dh.c
index f7769cc..462570c 100644
--- a/apps/dh.c
+++ b/apps/dh.c
@@ -155,7 +155,7 @@
 		BIO_printf(bio_err," -in arg       input file\n");
 		BIO_printf(bio_err," -out arg      output file\n");
 		BIO_printf(bio_err," -check        check the DH parameters\n");
-		BIO_printf(bio_err," -text         check the DH parameters\n");
+		BIO_printf(bio_err," -text         print a text form of the DH parameters\n");
 		BIO_printf(bio_err," -C            Output C code\n");
 		BIO_printf(bio_err," -noout        no output\n");
 		goto end;