IGNITE-24189 Fix some <pre>{@code javadoc entries (#5042)

modules/configuration-api/src/main/java/org/apache/ignite/configuration/annotation/Config.java

@@ -34,20 +34,18 @@
  * <li>View - immutable object to view config tree</li>
  * </ul>
  * Here is how to create a configuration schema part:
- * <pre><code>
- * {@literal @}Config
+ * <pre><code> {@literal @}Config
  * public class SubConfigurationSchema {
  *
- *      {@literal @}Value
+ *     {@literal @}Value
  *      public String foo;
  *
- *      {@literal @}Value
+ *     {@literal @}Value
  *      public boolean bar;
  *
- *      {@literal @}ConfigValue
+ *     {@literal @}ConfigValue
  *      public SomeOtherConfiguration someOther;
- * }
- * </code></pre>
+ * }</code></pre>
  *
  * <p>The main difference between @{@link ConfigurationRoot} and @{@link Config} is that the former marks schema root,
  * while the latter is for marking non-root parts of the schema.

modules/configuration-api/src/main/java/org/apache/ignite/configuration/annotation/InjectedValue.java

@@ -38,22 +38,19 @@
  *
  * <p>For example, this annotation can be used to declare a configuration schema with arbitrary {@code String} properties:
  *
- * <pre>{@code
- *     @Config
- *     class PropertyConfigurationSchema {
- *         @NamedConfigValue
- *         public PropertyEntryConfigurationSchema properties;
- *     }
- *
- *     @Config
- *     class PropertyEntryConfigurationSchema {
- *         @InjectedName
- *         public String propertyName;
+ * <pre><code> {@literal @}Config
+ * class PropertyConfigurationSchema {
+ *    {@literal @}NamedConfigValue
+ *     public PropertyEntryConfigurationSchema properties;
+ * }</code></pre>
+ * <pre><code> {@literal @}Config
+ * class PropertyEntryConfigurationSchema {
+ *    {@literal @}InjectedName
+ *     public String propertyName;
  *
- *         @InjectedValue
- *         public String propertyValue;
- *     }
- * }</pre>
+ *    {@literal @}InjectedValue
+ *     public String propertyValue;
+ * }</code></pre>
  *
  * <p>This will allow to use the following HOCON to represent this configuration:
  *

modules/core/src/testFixtures/java/org/apache/ignite/internal/testframework/WithSystemProperty.java

@@ -33,44 +33,42 @@
  * In short, these two approaches are basically equivalent:<br>
  * <br>
  * Short:
- * <pre>{@code  @WithSystemProperty(key = "name", value = "val")
- *  public class SomeTest {
- *  }
- * }</pre>
+ * <pre><code> {@literal @}WithSystemProperty(key = "name", value = "val")
+ * public class SomeTest {
+ * }</code></pre>
  * Long:
- * <pre>{@code  public class SomeTest {
+ * <pre><code>  public class SomeTest {
  *      private static Object oldVal;
  *
- *      @BeforeClass
+ *     {@literal @}BeforeClass
  *      public static void beforeClass() {
  *          oldVal = System.getProperty("name");
  *
  *          System.setProperty("name", "val");
  *      }
  *
- *      @AfterClass
+ *     {@literal @}AfterClass
  *      public static void afterClass() {
  *          if (oldVal == null)
  *              System.clearProperty("name");
  *          else
  *              System.setProperty("name", oldVal);
  *      }
- *  }
- * }</pre>
+ *  }</code></pre>
  *
  * <p>Same applies to methods with the difference that annotation translates into something like {@link BeforeEach} and {@link AfterEach}.
  * <br><br>
- * <pre>{@code  public class SomeTest {
- *      @Test
- *      @WithSystemProperty(key = "name", value = "val")
+ * <pre><code>  public class SomeTest {
+ *     {@literal @}Test
+ *     {@literal @}WithSystemProperty(key = "name", value = "val")
  *      public void test() {
  *          // ...
  *      }
  *  }
- * }</pre>
+ * </code></pre>
  * is equivalent to:
- * <pre>{@code  public class SomeTest {
- *      @Test
+ * <pre><code>  public class SomeTest {
+ *     {@literal @}Test
  *      public void test() {
  *          Object oldVal = System.getProperty("name");
  *
@@ -85,7 +83,7 @@
  *          }
  *      }
  *  }
- * }</pre>
+ * </code></pre>
  * For class level annotation it applies system properties for the whole class hierarchy (ignoring interfaces, there's no linearization
  * implemented). More specific classes have higher priority and set their properties last. It all starts with {@link Object} which, of
  * course, is not annotated.<br>