Don't use markdown syntax in javadoc or error messages

Closes gh-28408

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/MetricsProperties.java

@@ -44,7 +44,7 @@ public class MetricsProperties {
 
 	/**
 	 * Whether meter IDs starting with the specified name should be enabled. The longest
-	 * match wins, the key `all` can also be used to configure all meters.
+	 * match wins, the key {@code "all"} can also be used to configure all meters.
 	 */
 	private final Map<String, Boolean> enable = new LinkedHashMap<>();
 
@@ -220,15 +220,15 @@ public static class Distribution {
 		 * Whether meter IDs starting with the specified name should publish percentile
 		 * histograms. For monitoring systems that support aggregable percentile
 		 * calculation based on a histogram, this can be set to true. For other systems,
-		 * this has no effect. The longest match wins, the key `all` can also be used to
-		 * configure all meters.
+		 * this has no effect. The longest match wins, the key {@code "all"} can also be
+		 * used to configure all meters.
 		 */
 		private final Map<String, Boolean> percentilesHistogram = new LinkedHashMap<>();
 
 		/**
 		 * Specific computed non-aggregable percentiles to ship to the backend for meter
-		 * IDs starting-with the specified name. The longest match wins, the key `all` can
-		 * also be used to configure all meters.
+		 * IDs starting-with the specified name. The longest match wins, the key
+		 * {@code "all"} can also be used to configure all meters.
 		 */
 		private final Map<String, double[]> percentiles = new LinkedHashMap<>();
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/web/server/ManagementServerProperties.java

@@ -51,8 +51,8 @@ public class ManagementServerProperties {
 	private InetAddress address;
 
 	/**
-	 * Management endpoint base path (for instance, `/management`). Requires a custom
-	 * management.server.port.
+	 * Management endpoint base path (for instance, {@code '/management'}). Requires a
+	 * custom management.server.port.
 	 */
 	private String basePath = "";
 
@@ -128,8 +128,8 @@ private String cleanBasePath(String basePath) {
 	public static class Servlet {
 
 		/**
-		 * Management endpoint context-path (for instance, `/management`). Requires a
-		 * custom management.server.port.
+		 * Management endpoint context-path (for instance, {@code '/management'}).
+		 * Requires a custom management.server.port.
 		 */
 		private String contextPath = "";
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/AbstractEndpointDocumentationTests.java

@@ -61,7 +61,7 @@ public abstract class AbstractEndpointDocumentationTests {
 
 	protected String describeEnumValues(Class<? extends Enum<?>> enumType) {
 		return StringUtils.collectionToDelimitedString(Stream.of(enumType.getEnumConstants())
-				.map((constant) -> "`" + constant.name() + "`").collect(Collectors.toList()), ", ");
+				.map((constant) -> "'" + constant.name() + "'").collect(Collectors.toList()), ", ");
 	}
 
 	protected OperationPreprocessor limit(String... keys) {

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/ConfigurationPropertiesReportEndpointDocumentationTests.java

@@ -46,7 +46,7 @@ void configProps() throws Exception {
 						preprocessResponse(limit("contexts", getApplicationContext().getId(), "beans")),
 						responseFields(fieldWithPath("contexts").description("Application contexts keyed by id."),
 								fieldWithPath("contexts.*.beans.*")
-										.description("`@ConfigurationProperties` beans keyed by bean name."),
+										.description("@ConfigurationProperties beans keyed by bean name."),
 								fieldWithPath("contexts.*.beans.*.prefix")
 										.description("Prefix applied to the names of the bean's properties."),
 								subsectionWithPath("contexts.*.beans.*.properties")

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/HealthEndpointDocumentationTests.java

@@ -81,7 +81,7 @@ void health() throws Exception {
 				.description("The nested components that make up the health.").optional();
 		FieldDescriptor componentDetails = subsectionWithPath("components.*.details")
 				.description("Details of the health of a specific part of the application. "
-						+ "Presence is controlled by `management.endpoint.health.show-details`.")
+						+ "Presence is controlled by 'management.endpoint.health.show-details'.")
 				.optional();
 		this.mockMvc.perform(get("/actuator/health").accept(MediaType.APPLICATION_JSON)).andExpect(status().isOk())
 				.andDo(document("health",

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/MetricsEndpointDocumentationTests.java

@@ -70,7 +70,7 @@ void metricWithTags() throws Exception {
 						"id:Compressed Class Space"))
 				.andExpect(status().isOk())
 				.andDo(document("metrics/metric-with-tags", requestParameters(parameterWithName("tag")
-						.description("A tag to use for drill-down in the form `name:value`."))));
+						.description("A tag to use for drill-down in the form 'name:value'."))));
 	}
 
 	@Configuration(proxyBeanMethods = false)

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/endpoint/web/documentation/ThreadDumpEndpointDocumentationTests.java

@@ -117,7 +117,7 @@ void jsonThreadDump() throws Exception {
 														.optional().type(JsonFieldType.NUMBER),
 												fieldWithPath("threads.[].lockOwnerId")
 														.description("ID of the thread that owns the object on which "
-																+ "the thread is blocked. `-1` if the "
+																+ "the thread is blocked. '-1' if the "
 																+ "thread is not blocked."),
 												fieldWithPath("threads.[].lockOwnerName")
 														.description("Name of the thread that owns the "

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/amqp/RabbitProperties.java

@@ -853,12 +853,12 @@ public static class Template {
 		private Boolean mandatory;
 
 		/**
-		 * Timeout for `receive()` operations.
+		 * Timeout for {@code receive()} operations.
 		 */
 		private Duration receiveTimeout;
 
 		/**
-		 * Timeout for `sendAndReceive()` operations.
+		 * Timeout for {@code sendAndReceive()} operations.
 		 */
 		private Duration replyTimeout;
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/batch/BatchProperties.java

@@ -82,7 +82,7 @@ public static class Job {
 
 		/**
 		 * Comma-separated list of job names to execute on startup (for instance,
-		 * `job1,job2`). By default, all Jobs found in the context are executed.
+		 * {@code "job1,job2"}). By default, all Jobs found in the context are executed.
 		 */
 		private String names = "";
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/RedisUrlSyntaxFailureAnalyzer.java

@@ -46,7 +46,7 @@ protected FailureAnalysis analyze(Throwable rootFailure, RedisUrlSyntaxException
 			}
 			if (!"redis".equals(uri.getScheme()) && !"rediss".equals(uri.getScheme())) {
 				return new FailureAnalysis(getUnsupportedSchemeDescription(cause.getUrl(), uri.getScheme()),
-						"Use the scheme 'redis://` for insecure or `rediss://` for secure Redis standalone configuration.",
+						"Use the scheme 'redis://' for insecure or 'rediss://' for secure Redis standalone configuration.",
 						cause);
 			}
 		}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jackson/JacksonProperties.java

@@ -45,7 +45,7 @@ public class JacksonProperties {
 
 	/**
 	 * Date format string or a fully-qualified date format class name. For instance,
-	 * `yyyy-MM-dd HH:mm:ss`.
+	 * {@code "yyyy-MM-dd HH:mm:ss"}.
 	 */
 	private String dateFormat;
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/mail/MailProperties.java

@@ -37,7 +37,7 @@ public class MailProperties {
 	private static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;
 
 	/**
-	 * SMTP server host. For instance, `smtp.example.com`.
+	 * SMTP server host. For instance, {@code "smtp.example.com"}.
 	 */
 	private String host;
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/session/NonUniqueSessionRepositoryFailureAnalyzer.java

@@ -37,7 +37,7 @@ protected FailureAnalysis analyze(Throwable rootFailure, NonUniqueSessionReposit
 		StringBuilder action = new StringBuilder();
 		action.append(String.format("Consider any of the following:%n"));
 		action.append(
-				String.format("    - Define the `spring.session.store-type` property to the store you want to use%n"));
+				String.format("    - Define the 'spring.session.store-type' property to the store you want to use%n"));
 		action.append(String.format("    - Review your classpath and remove the unwanted store implementation(s)%n"));
 		return new FailureAnalysis(message.toString(), action.toString(), cause);
 	}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java

@@ -996,7 +996,7 @@ public static class Remoteip {
 
 			/**
 			 * Name of the HTTP header from which the remote IP is extracted. For
-			 * instance, `X-FORWARDED-FOR`.
+			 * instance, {@code "X-FORWARDED-FOR"}.
 			 */
 			private String remoteIpHeader;
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/WebFluxProperties.java

@@ -88,17 +88,17 @@ public void setStaticPathPattern(String staticPathPattern) {
 	public static class Format {
 
 		/**
-		 * Date format to use, for example `dd/MM/yyyy`.
+		 * Date format to use, for example {@code "dd/MM/yyyy"}.
 		 */
 		private String date;
 
 		/**
-		 * Time format to use, for example `HH:mm:ss`.
+		 * Time format to use, for example {@code "HH:mm:ss"}.
 		 */
 		private String time;
 
 		/**
-		 * Date-time format to use, for example `yyyy-MM-dd HH:mm:ss`.
+		 * Date-time format to use, for example {@code "yyyy-MM-dd HH:mm:ss"}.
 		 */
 		private String dateTime;
 

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/WebMvcProperties.java

@@ -42,7 +42,7 @@
 public class WebMvcProperties {
 
 	/**
-	 * Formatting strategy for message codes. For instance, `PREFIX_ERROR_CODE`.
+	 * Formatting strategy for message codes. For instance, {@code PREFIX_ERROR_CODE}.
 	 */
 	private DefaultMessageCodesResolver.Format messageCodesResolverFormat;
 
@@ -493,17 +493,17 @@ public void setUseRegisteredSuffixPattern(boolean useRegisteredSuffixPattern) {
 	public static class Format {
 
 		/**
-		 * Date format to use, for example `dd/MM/yyyy`.
+		 * Date format to use, for example {@code "dd/MM/yyyy"}.
 		 */
 		private String date;
 
 		/**
-		 * Time format to use, for example `HH:mm:ss`.
+		 * Time format to use, for example {@code "HH:mm:ss"}.
 		 */
 		private String time;
 
 		/**
-		 * Date-time format to use, for example `yyyy-MM-dd HH:mm:ss`.
+		 * Date-time format to use, for example {@code "yyyy-MM-dd HH:mm:ss"}.
 		 */
 		private String dateTime;
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/redis/RedisUrlSyntaxFailureAnalyzerTests.java

@@ -43,7 +43,7 @@ void analyzeRedisHttpUrl() {
 		FailureAnalysis analysis = new RedisUrlSyntaxFailureAnalyzer().analyze(exception);
 		assertThat(analysis.getDescription()).contains("The URL 'http://127.0.0.1:26379/mymaster' is not valid")
 				.contains("The scheme 'http' is not supported");
-		assertThat(analysis.getAction()).contains("Use the scheme 'redis://` for insecure or `rediss://` for secure");
+		assertThat(analysis.getAction()).contains("Use the scheme 'redis://' for insecure or 'rediss://' for secure");
 	}
 
 	@Test

spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/main/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessor.java

@@ -233,7 +233,7 @@ private void processExecutableElement(String prefix, ExecutableElement element,
 						element.toString());
 				if (this.metadataCollector.hasSimilarGroup(group)) {
 					this.processingEnv.getMessager().printMessage(Kind.ERROR,
-							"Duplicate `@ConfigurationProperties` definition for prefix '" + prefix + "'", element);
+							"Duplicate @ConfigurationProperties definition for prefix '" + prefix + "'", element);
 				}
 				else {
 					this.metadataCollector.add(group);

spring-boot-project/spring-boot-tools/spring-boot-gradle-plugin/src/test/java/org/springframework/boot/gradle/docs/GettingStartedDocumentationTests.java

@@ -33,7 +33,7 @@ class GettingStartedDocumentationTests {
 
 	GradleBuild gradleBuild;
 
-	// NOTE: We can't run any `apply-plugin` tests because during a release the
+	// NOTE: We can't run any 'apply-plugin' tests because during a release the
 	// jar won't be there
 
 	@TestTemplate

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/LayersIndex.java

@@ -42,7 +42,7 @@
  * layer.
  * <p>
  * Index files are designed to be compatible with YAML and may be read into a list of
- * `Map&lt;String, List&lt;String&gt;&gt;` instances.
+ * {@code Map<String, List<String>>} instances.
  *
  * @author Madhura Bhave
  * @author Andy Wilkinson

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/diagnostics/analyzer/PatternParseFailureAnalyzer.java

@@ -32,7 +32,7 @@ class PatternParseFailureAnalyzer extends AbstractFailureAnalyzer<PatternParseEx
 	protected FailureAnalysis analyze(Throwable rootFailure, PatternParseException cause) {
 		return new FailureAnalysis("Invalid mapping pattern detected: " + cause.toDetailedString(),
 				"Fix this pattern in your application or switch to the legacy parser implementation with "
-						+ "`spring.mvc.pathpattern.matching-strategy=ant_path_matcher`.",
+						+ "'spring.mvc.pathpattern.matching-strategy=ant_path_matcher'.",
 				cause);
 	}
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/error/ErrorController.java

@@ -30,11 +30,11 @@
 public interface ErrorController {
 
 	/**
-	 * The return value from this method is not used; the property `server.error.path`
-	 * must be set to override the default error page path.
+	 * The return value from this method is not used; the property
+	 * {@code "server.error.path"} must be set to override the default error page path.
 	 * @return the error path
 	 * @deprecated since 2.3.0 for removal in 2.5.0 in favor of setting the property
-	 * `server.error.path`
+	 * {@code server.error.path}
 	 */
 	@Deprecated
 	String getErrorPath();

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/package-info.java

@@ -15,6 +15,6 @@
  */
 
 /**
- * Classes and utilities designed to work with the `javax.servlet` specification.
+ * Classes and utilities designed to work with the {@code javax.servlet} specification.
  */
 package org.springframework.boot.web.servlet;

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/ConfigurationPropertyNameTests.java

@@ -665,7 +665,7 @@ void isValidWhenNotValidShouldReturnFalse() {
 	void hashCodeIsStored() {
 		ConfigurationPropertyName name = ConfigurationPropertyName.of("hash.code");
 		int hashCode = name.hashCode();
-		// hasFieldOrPropertyWithValue would lookup for `hashCode()`.
+		// hasFieldOrPropertyWithValue would lookup for hashCode()
 		assertThat(ReflectionTestUtils.getField(name, "hashCode")).isEqualTo(hashCode);
 	}
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/diagnostics/analyzer/PatternParseFailureAnalyzerTests.java

@@ -39,7 +39,7 @@ void patternParseFailureQuotesPattern() {
 		assertThat(failureAnalysis.getDescription()).contains("Invalid mapping pattern detected: /spring/**/framework");
 		assertThat(failureAnalysis.getAction())
 				.contains("Fix this pattern in your application or switch to the legacy parser"
-						+ " implementation with `spring.mvc.pathpattern.matching-strategy=ant_path_matcher`.");
+						+ " implementation with 'spring.mvc.pathpattern.matching-strategy=ant_path_matcher'.");
 	}
 
 	private FailureAnalysis performAnalysis(String pattern) {