Remove redundant word from console output for test case started events in verbose mode (#1180)

This is a small fix for an oversight I made in #1125: the word `started`
is printed twice at the end of the console message for
`.testCaseStarted` events in verbose mode.

### Checklist:

- [x] Code and documentation should follow the style of the [Style
Guide](https://github.com/apple/swift-testing/blob/main/Documentation/StyleGuide.md).
- [x] If public symbols are renamed or modified, DocC references should
be updated.

Author: stmontgomery

Sources/Testing/Events/Recorder/Event.HumanReadableOutputRecorder.swift

@@ -521,12 +521,10 @@ extension Event.HumanReadableOutputRecorder {
         break
       }
 
-      let status = verbosity > 0 ? " started" : ""
-
       return [
         Message(
           symbol: .default,
-          stringValue: "Test case passing \(arguments.count.counting("argument")) \(testCase.labeledArguments(includingQualifiedTypeNames: verbosity > 0)) to \(testName)\(status) started."
+          stringValue: "Test case passing \(arguments.count.counting("argument")) \(testCase.labeledArguments(includingQualifiedTypeNames: verbosity > 0)) to \(testName) started."
         )
       ]
 

Tests/TestingTests/EventRecorderTests.swift

@@ -113,6 +113,10 @@ struct EventRecorderTests {
     #expect(buffer.contains(#"\#(Event.Symbol.details.unicodeCharacter) lhs: Swift.String → "987""#))
     #expect(buffer.contains(#""Animal Crackers" (aka 'WrittenTests')"#))
     #expect(buffer.contains(#""Not A Lobster" (aka 'actuallyCrab()')"#))
+    do {
+      let regex = try Regex(".* Test case passing 1 argument i → 0 \\(Swift.Int\\) to multitudeOcelot\\(i:\\) started.")
+      #expect(try buffer.split(whereSeparator: \.isNewline).compactMap(regex.wholeMatch(in:)).first != nil)
+    }
     do {
       let regex = try Regex(".* Test case passing 1 argument i → 0 \\(Swift.Int\\) to multitudeOcelot\\(i:\\) passed after .*.")
       #expect(try buffer.split(whereSeparator: \.isNewline).compactMap(regex.wholeMatch(in:)).first != nil)