login: style fixes

diff --git a/libbb/change_identity.c b/libbb/change_identity.c
index 74ffccb..63c5ae1 100644
--- a/libbb/change_identity.c
+++ b/libbb/change_identity.c
@@ -40,21 +40,21 @@
 
 
 /* Become the user and group(s) specified by PW.  */
-const char *change_identity_e2str ( const struct passwd *pw )
+const char *change_identity_e2str(const struct passwd *pw)
 {
-	if ( initgroups ( pw-> pw_name, pw-> pw_gid ) == -1 )
+	if (initgroups(pw->pw_name, pw->pw_gid) == -1)
 		return "cannot set groups";
-	endgrent ( );
+	endgrent();
 
-	xsetgid(pw-> pw_gid);
+	xsetgid(pw->pw_gid);
 	xsetuid(pw->pw_uid);
 	return NULL;
 }
 
-void change_identity ( const struct passwd *pw )
+void change_identity(const struct passwd *pw)
 {
 	const char *err_msg = change_identity_e2str(pw);
 
 	if(err_msg)
-		bb_perror_msg_and_die ( "%s", err_msg );
+		bb_perror_msg_and_die("%s", err_msg);
 }