normalize escaped runner e2e markers

tests/runner-e2e/matchers.ts

@@ -40,6 +40,10 @@ export interface MatcherResult {
 function normalizeMessage(value: string | undefined) {
   return (value ?? "")
     .replace(/\r\n/g, "\n")
+    // Some provider renderers escape underscores in plain-text identifiers
+    // before persisting Markdown. Treat that presentation-only escape as the
+    // same visible marker for exact/contains/ordered message assertions.
+    .replace(/\\_/g, "_")
     .replace(/[ \t]+/g, " ")
     .trim();
 }

tests/runner-e2e/support.test.ts

@@ -170,7 +170,7 @@ describe("runner E2E matchers", () => {
         { kind: "runtime_mode", expected: "native" },
       ],
       {
-        message: "  complete   PAPERCLIP_E2E_OK_nonce  ",
+        message: "  complete   PAPERCLIP\\_E2E\\_OK\\_nonce  ",
         issueStatus: "done",
         runtimeMode: "native",
       },