test: Auto-redact file number

Author: dieterplex

crates/cargo-test-support/src/compare.rs

@@ -164,6 +164,11 @@ fn add_common_redactions(subs: &mut snapbox::Redactions) {
         regex!("; finished in (?<redacted>[0-9]+(\\.[0-9]+))s"),
     )
     .unwrap();
+    subs.insert(
+        "[FILE_NUM]",
+        regex!(r"\[(PACKAGED|REMOVED|SUMMARY)\] (?<redacted>[0-9]+) files"),
+    )
+    .unwrap();
     subs.insert(
         "[FILE_SIZE]",
         regex!("(?<redacted>[0-9]+(\\.[0-9]+)([a-zA-Z]i)?)B"),