Finalize 5.9.3 release notes

Author: marcphilipp

documentation/src/docs/asciidoc/release-notes/release-notes-5.9.3.adoc

@@ -1,7 +1,7 @@
 [[release-notes-5.9.3]]
 == 5.9.3
 
-*Date of Release:* April ❓, 2023
+*Date of Release:* April 26, 2023
 
 *Scope:* Bug fixes and enhancements since 5.9.2
 
@@ -33,12 +33,12 @@ No changes.
 * The search algorithm used to find `@MethodSource` factory methods now applies consistent
   semantics for _local_ qualified method names and fully-qualified method names for
   overloaded factory methods.
-* The `{displayName}` placeholder for `@ParameterizedTest` invocation names is no longer
-  parsed using `java.text.MessageFormat`. Consequently, any text in the display name of
+* The `+{displayName}+` placeholder for `@ParameterizedTest` invocation names is no longer
+  parsed using `java.text.MessageFormat`.Consequently, any text in the display name of
   the `@ParameterizedTest` method will be included unmodified in the invocation display
-  name. For example, Kotlin method names and custom display names configured via
+  name.For example, Kotlin method names and custom display names configured via
   `@DisplayName` can now contain apostrophes (`'`) as well as text resembling
-  `MessageFormat` elements such as `{0}` or `{data}`.
+  `MessageFormat` elements such as `+{0}+` or `+{data}+`.
 * Exceptions thrown for files that cannot be deleted when cleaning up a temporary
   directory created via `@TempDir` now include the root cause.
 * Lifecycle methods are allowed to be declared as `private` again for backwards