Doc: update Contentmanipulation example docs

- Update screenshot
- Remove second \brief command
- Fix grammar issues
- Use standard phrasing for examples
- Replace \snippet commands with \quotefromfile commands.
  This enables documenting each line of code separately
- Replace occurrences of QWebView with QWebEngineView
- Replace reference to the obsolete QWebEnginePage::evaluateJavaScript
  method with reference to QWebEnginePage::runJavaScript() that is used
  in the example code
- Remove snippet markers from mainwindow.h and mainwindow.cpp
- Move code comment from mainwindow.cpp to the documentation to make the
  code leaner

Change-Id: If3346810c8aef67c15c9ec7ad4469a222e636cf2
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/examples/webenginewidgets/contentmanipulation/mainwindow.h b/examples/webenginewidgets/contentmanipulation/mainwindow.h
index 8e9b12538..06b8aba03 100644
--- a/examples/webenginewidgets/contentmanipulation/mainwindow.h
+++ b/examples/webenginewidgets/contentmanipulation/mainwindow.h
@@ -45,7 +45,6 @@ class QWebEngineView;
 class QLineEdit;
 QT_END_NAMESPACE
 
-//! [1]
 class MainWindow : public QMainWindow
 {
     Q_OBJECT
@@ -76,5 +75,4 @@ private:
     QLineEdit *locationEdit;
     QAction *rotateAction;
     int progress;
-//! [1]
 };