Fix a couple of comments in `DumpPlatformClassPath`.

PiperOrigin-RevId: 549327431
Change-Id: I95c40ffd3e21dabbf6227d43419fc93ad529f582

toolchains/DumpPlatformClassPath.java

diff --git a/toolchains/DumpPlatformClassPath.java b/toolchains/DumpPlatformClassPath.java
index 0832853..fafb843 100644
--- a/toolchains/DumpPlatformClassPath.java
+++ b/toolchains/DumpPlatformClassPath.java
@@ -47,7 +47,7 @@
 /**
  * Output a jar file containing all classes on the platform classpath of the given JDK release.
  *
- * <p>usage: DumpPlatformClassPath <release version> <output jar> <path to target JDK>?
+ * <p>usage: {@code DumpPlatformClassPath <output jar> <path to target JDK>}
  */
 public class DumpPlatformClassPath {
 
@@ -90,7 +90,7 @@
     // * --release takes a language level (e.g. '9') and uses the API information baked in to
     //     the host JDK (in lib/ct.sym).
 
-    // Since --system only supports JDK >= 9, first check of the target JDK defines a JDK 8
+    // Since --system only supports JDK >= 9, first check if the target JDK defines a JDK 8
     // bootclasspath.
     List<Path> bootClassPathJars = getBootClassPathJars(targetJavabase);
     if (!bootClassPathJars.isEmpty()) {