Apply suggestions from code review

Co-authored-by: Anders Schack-Mulligen <aschackmull@users.noreply.github.com>

java/ql/src/semmle/code/java/JDK.qll

@@ -212,14 +212,14 @@ class MethodSystemGetProperty extends Method {
 }
 
 /**
- * Any method access to a method named `getProperty` on class `java.lang.System`.
+ * An access to a method named `getProperty` on class `java.lang.System`.
  */
 class MethodAccessSystemGetProperty extends MethodAccess {
   MethodAccessSystemGetProperty() { getMethod() instanceof MethodSystemGetProperty }
 
   /**
-   * Holds true if this is a compile-time constant call for the specified `propertyName`.
-   * Eg. `System.getProperty("user.dir")`.
+   * Holds if this call has a compile-time constant first argument with the value `propertyName`.
+   * For example: `System.getProperty("user.dir")`.
    */
   predicate hasCompileTimeConstantGetPropertyName(string propertyName) {
     this.getArgument(0).(CompileTimeConstantExpr).getStringValue() = propertyName

java/ql/test/library-tests/JDK/SystemGetPropertyCall.ql

@@ -1,9 +1,4 @@
-/**
- * @name SystemCall
- * @description Test the definition of System Get Property
- */
-
-import default
+import java
 
 from MethodAccessSystemGetProperty ma
 where ma.hasCompileTimeConstantGetPropertyName("user.dir")