-Xjdk-release. Review fixes

compiler/testData/cli/jvm/extraHelp.out

@@ -35,8 +35,9 @@ where advanced options include:
   -Xjava-package-prefix      Package prefix for Java files
   -Xjava-source-roots=<path> Paths to directories with Java source files
   -Xjavac-arguments=<option[,]> Java compiler arguments
-  -Xjdk-release=<version>    Compile against specified JDK API. Requires JDK 9 or newer.
-                             Supported versions depend on used JDK (For JDK 17 supported targets are 1.8, 9, 10 - 17). Also set `-jvm-target` value
+  -Xjdk-release=<version>    Compile against the specified JDK API version, similarly to javac's `-release`. Requires JDK 9 or newer.
+                             Supported versions depend on the used JDK; for JDK 17+ supported versions are 1.8, 9, 10, ..., 17.
+                             Also sets `-jvm-target` value equal to the selected JDK version
   -Xjspecify-annotations=ignore|strict|warn
                              Specify behavior for jspecify annotations.
                              Default value is 'warn'

compiler/testData/javaModules/releaseFlagConflict/module11.txt

@@ -1,2 +1,2 @@
-error: `-Xrelease=11` option conflicts with '-jvm-target=10'.
+error: '-Xjdk-release=11' option conflicts with '-jvm-target 10'. Please remove the '-jvm-target' option
 COMPILATION_ERROR

compiler/testData/javaModules/releaseFlagConflict/module9.txt

@@ -1,2 +1,2 @@
-error: `-Xrelease=9` option conflicts with '-jvm-target=10'.
+error: '-Xjdk-release=9' option conflicts with '-jvm-target 10'. Please remove the '-jvm-target' option
 COMPILATION_ERROR

compiler/testData/javaModules/releaseFlagWrongValue/module5.txt

@@ -1,4 +1,4 @@
-error: `5` is not valid value for `-Xrelease` flag.
+error: unknown JDK release version: 5
 error: unknown JVM target version: 5
 Supported versions: 1.6, 1.8, 9, 10, 11, 12, 13, 14, 15, 16, 17
 COMPILATION_ERROR