polish learning documentation consistency

Author: jrodolfo

docs/demo-script.md

@@ -57,7 +57,7 @@ Java 8 changed everyday Java style. Streams let me describe collection transform
 Run:
 
 ```bash
-mvn -Dtest=StreamExamplesTest test
+mvn "-Dtest=StreamExamplesTest" test
 ```
 
 Expected point: the test proves the behavior and acts as executable documentation.
@@ -80,7 +80,7 @@ Java 21 is important because it is an LTS release. Virtual threads let blocking,
 Run:
 
 ```bash
-mvn -Dtest=VirtualThreadsExamplesTest test
+mvn "-Dtest=VirtualThreadsExamplesTest" test
 ```
 
 Expected point: the example shows the API shape without turning the repository into a full web application.
@@ -105,7 +105,7 @@ For newer releases, I separate final features from preview, incubator, runtime,
 Run:
 
 ```bash
-mvn -Dtest=ScopedValuesExamplesTest test
+mvn "-Dtest=ScopedValuesExamplesTest" test
 ```
 
 Expected point: current-release awareness is useful only if you can also explain feature maturity and the project's build baseline.
@@ -146,7 +146,7 @@ Use this when time is short:
 5. Run one focused command:
 
 ```bash
-mvn -Dtest=VirtualThreadsExamplesTest test
+mvn "-Dtest=VirtualThreadsExamplesTest" test
 ```
 
 Close with:
@@ -174,9 +174,9 @@ Use this before a live walkthrough to verify that the hands-on demos still match
 Run one example:
 
 ```bash
-mvn -Dtest=StreamExamplesTest test
-mvn -Dtest=VirtualThreadsExamplesTest test
-mvn -Dtest=ScopedValuesExamplesTest test
+mvn "-Dtest=StreamExamplesTest" test
+mvn "-Dtest=VirtualThreadsExamplesTest" test
+mvn "-Dtest=ScopedValuesExamplesTest" test
 ```
 
 Generate JavaDoc:

docs/learning-path.md

@@ -308,4 +308,4 @@ Use this checklist when preparing to show the repository:
 4. Pick one Java 8 example and explain the problem it solved.
 5. Pick one Java 21 example and explain why it matters for current production Java.
 6. Pick one Java 25 or Java 26 example or notes class and explain whether the feature is final, preview, incubator, runtime, tooling-related, security-related, or removal-related.
-7. Use [docs/jep-index.md](jep-index.md) when you need the official JEP number or status.
+7. Use [jep-index.md](jep-index.md) when you need the official JEP number or status.

docs/study-guide.md

@@ -67,7 +67,7 @@ Do not try to memorize every JEP number on the first pass. Focus on explaining w
 3. **Java 8**
    Study lambdas, streams, `Optional`, method references, `CompletableFuture`, default methods, and the date/time API. These are still daily-use features.
 
-4. **Java 10, 11**
+4. **Java 9-11**
    Study `var`, `HttpClient`, String APIs, files APIs, `Predicate.not`, and `Optional.isEmpty`. These show how Java became more concise without becoming dynamic.
 
 5. **Java 12-16**