test: relax assertions of panic handler message format

Author: weihanglo

tests/testsuite/bench.rs

@@ -313,9 +313,8 @@ fn cargo_bench_failing_test() {
 [FINISHED] bench [optimized] target(s) in [..]
 [RUNNING] [..] (target/release/deps/foo-[..][EXE])",
         )
-        .with_stdout_contains(
-            "[..]thread '[..]' panicked at 'assertion failed: `(left == right)`[..]",
-        )
+        .with_stdout_contains("[..]thread '[..]' panicked at[..]")
+        .with_stdout_contains("[..]assertion failed[..]")
         .with_stdout_contains("[..]left: `\"hello\"`[..]")
         .with_stdout_contains("[..]right: `\"nope\"`[..]")
         .with_stdout_contains("[..]src/main.rs:15[..]")

tests/testsuite/install.rs

@@ -1269,7 +1269,8 @@ fn reports_unsuccessful_subcommand_result() {
         .run();
     cargo_process("fail")
         .with_status(101)
-        .with_stderr_contains("thread '[..]' panicked at 'explicit panic', [..]")
+        .with_stderr_contains("thread '[..]' panicked at [..]src/main.rs:1:[..]")
+        .with_stderr_contains("[..]explicit panic[..]")
         .run();
 }
 

tests/testsuite/test.rs

@@ -387,8 +387,9 @@ test test_hello ... FAILED
 failures:
 
 ---- test_hello stdout ----
-[..]thread '[..]' panicked at 'assertion failed:[..]",
+[..]thread '[..]' panicked at [..]",
         )
+        .with_stdout_contains("[..]assertion failed[..]")
         .with_stdout_contains("[..]`(left == right)`[..]")
         .with_stdout_contains("[..]left: `\"hello\"`,[..]")
         .with_stdout_contains("[..]right: `\"nope\"`[..]")
@@ -437,10 +438,10 @@ test test_hello ... FAILED
 failures:
 
 ---- test_hello stdout ----
-[..]thread '[..]' panicked at 'assertion failed: false', \
-      tests/footest.rs:1[..]
+[..]thread '[..]' panicked at [..]tests/footest.rs:1:[..]
 ",
         )
+        .with_stdout_contains("[..]assertion failed[..]")
         .with_stdout_contains(
             "\
 failures:
@@ -473,10 +474,10 @@ test test_hello ... FAILED
 failures:
 
 ---- test_hello stdout ----
-[..]thread '[..]' panicked at 'assertion failed: false', \
-      src/lib.rs:1[..]
+[..]thread '[..]' panicked at [..]src/lib.rs:1:[..]
 ",
         )
+        .with_stdout_contains("[..]assertion failed[..]")
         .with_stdout_contains(
             "\
 failures: