fix some doc/typo

Author: jknack

md/app.md

@@ -17,7 +17,7 @@ public class App extends Jooby { // 1.
     get("/", () -> "Hello");
   }
 
-  public static void main(String[] args) throws Exception {
+  public static void main(String[] args) throws Throwable {
     // 3. run my app
     run(App::new, args);
   }

md/doc/whoops/whoops.md

@@ -39,7 +39,7 @@ The pretty error page handler is available in development mode: ```application.e
 
 ## custom err pages
 
-The pretty error page is implemented via [err(req, rsp, err)]({{defdocs}}/Routes.html#err-org.jooby.Err.Handler-). You might run into troubles if your application require custom error pages. On those cases you probably won't use this module or if apply one of the following options:
+The pretty error page is implemented via [err(req, rsp, err)]({{defdocs}}/Routes.html#err-org.jooby.Err.Handler-). You might run into troubles if your application require custom error pages. On those cases you probably won't use this module or apply one of the following options:
 
 ### whoops as last err handler
 

md/jooby-lang.md

@@ -11,7 +11,7 @@ public class App extends Jooby {
     get("/", () -> "Hey Jooby!");
   }
 
-  public static void main(final String[] args) throws Exception {
+  public static void main(final String[] args) throws Throwable {
     run(App::new, args);
   }
 }

md/quickstart.md

@@ -98,7 +98,7 @@ public class App extends Jooby { // 1
     get("/", () -> "Hello World!");
   }
 
-  public static void main(final String[] args) throws Exception {
+  public static void main(final String[] args) throws Throwable {
     run(App::new, args); // 3. start the application.
   }