improve readability of string: fix indentation and remove trailing spaces

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
diff --git a/libc/string/strncpy.c b/libc/string/strncpy.c
index b91091b..4426cbe 100644
--- a/libc/string/strncpy.c
+++ b/libc/string/strncpy.c
@@ -54,8 +54,8 @@
 				/* NUL pad the remaining n-1 bytes */
 				while (--n != 0)
 					*d++ = 0;
-      break;
-  }
+				break;
+			}
 		} while (--n != 0);
 	}
 	return (dst);