Doc: Describe setting default line endings

For all projects or for the current project.

Change-Id: Ie29c4ad42e62810a5c51e950b0d764e906308bda
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

doc/qtcreator/src/editors/creator-coding-edit-mode.qdoc

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2019 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the Qt Creator documentation.
@@ -124,6 +124,15 @@
     To switch between Windows line endings (CRLF) and Unix line endings (LF),
     select the ending style on the editor toolbar (6).
 
+    To set the line endings to use for all projects by default, select
+    \uicontrol Tools > \uicontrol Options > \uicontrol {Text Editor} >
+    \uicontrol Behavior, and then select the ending style in the
+    \uicontrol {Default line endings} field.
+
+    To set the line endings to use for a project, select \uicontrol Projects >
+    \uicontrol {Project Settings} > \uicontrol Editor. For more information,
+    see \l {Specifying Editor Settings}.
+
     \section1 Splitting the Editor View
 
     Split the editor view or open the editor in a new window when you want to

doc/qtcreator/src/projects/creator-only/creator-projects-settings-editor.qdoc

@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2018 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the Qt Creator documentation.
@@ -71,6 +71,8 @@
 
         \li \l{File Encoding}
 
+        \li \l{Selecting Line Ending Style}
+
         \li \l{Moving to Symbol Definition or Declaration}
 
         \li \l{Configuring Fonts}