Reduce the default max number of files in a UI test directory

It doesn't make sense for the root directory to have a lower limit than
subdirectories.

Author: jyn514

src/tools/tidy/src/ui_tests.rs

@@ -7,8 +7,8 @@ use std::collections::HashMap;
 use std::fs;
 use std::path::{Path, PathBuf};
 
-const ENTRY_LIMIT: usize = 1000;
 // FIXME: The following limits should be reduced eventually.
+const ENTRY_LIMIT: usize = 885;
 const ROOT_ENTRY_LIMIT: usize = 881;
 const ISSUES_ENTRY_LIMIT: usize = 1978;