Fix header warning assertion

This commit fixes the [types removal] warning headers
removal in #120 to filter to those that don't start with
[types removal] **and** are not in allowed_warnings.

Author: russcam

yaml_test_runner/src/step/do.rs

@@ -110,7 +110,7 @@ impl Do {
             tokens.append(quote! {
                 let allowed_warnings = vec![#(#allowed),*];
                 let warnings: Vec<&str> = response.warning_headers()
-                    .filter(|w| !w.starts_with("[types removal]") || !allowed_warnings.iter().any(|a| w.contains(a)))
+                    .filter(|w| !w.starts_with("[types removal]") && !allowed_warnings.iter().any(|a| w.contains(a)))
                     .collect();
                 assert_warnings_is_empty!(warnings);
             });