bump ROOT_ENTRY_LIMIT only what is required

Author: Oneirical

src/tools/tidy/src/ui_tests.rs

@@ -18,7 +18,7 @@ const ENTRY_LIMIT: usize = 900;
 // FIXME: The following limits should be reduced eventually.
 
 const ISSUES_ENTRY_LIMIT: usize = 1750;
-const ROOT_ENTRY_LIMIT: usize = 900;
+const ROOT_ENTRY_LIMIT: usize = 861;
 
 const EXPECTED_TEST_FILE_EXTENSIONS: &[&str] = &[
     "rs",     // test source files