chore(style): remove the trailing space from all source files (#3188)

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

docs/others/fragment.md

@@ -1,5 +1,5 @@
 ```eval_rst
-.. include:: /header.rst 
+.. include:: /header.rst
 :github_url: |github_link_base|/others/fragment.md
 ```
 
@@ -15,7 +15,7 @@ to, the host’s view hierarchy.
 Such concept also has some similarities
 to [UiViewController on iOS](https://developer.apple.com/documentation/uikit/uiviewcontroller).
 
-Fragment Manager is a manager holding references to fragments attached to it, and has an internal stack to achieve 
+Fragment Manager is a manager holding references to fragments attached to it, and has an internal stack to achieve
 navigation. You can use fragment manager to build navigation stack, or multi pane application easily.
 
 ## Usage

docs/others/gridnav.md

@@ -1,5 +1,5 @@
 ```eval_rst
-.. include:: /header.rst 
+.. include:: /header.rst
 :github_url: |github_link_base|/others/gridnav.md
 ```
 # Grid navigation
@@ -15,30 +15,30 @@ This means that gridnav works with manually positioned children, as well as [Fle
 Gridnav also works if the children are arranged into a single row or column.
 That makes it useful, for example, to simplify navigation on a [List widget](/widgets/extra/list).
 
-Gridnav assumes that the object to which gridnav is added is part of a [group](/overview/indev.html#groups). 
+Gridnav assumes that the object to which gridnav is added is part of a [group](/overview/indev.html#groups).
 This way, if the object with gridnav is focused, the arrow key presses are automatically forwarded to the object
 so that gridnav can process the arrow keys.
 
-To move the focus to the next widget of the group use `LV_KEY_NEXT/PREV` or `lv_group_focus_next/prev()` or the `TAB` key on keyboard as usual. 
- 
+To move the focus to the next widget of the group use `LV_KEY_NEXT/PREV` or `lv_group_focus_next/prev()` or the `TAB` key on keyboard as usual.
+
 If the container is scrollable and the focused child is out of the view, gridnav will automatically scroll the child into view.
- 
+
 ## Usage
 
 To add the gridnav feature to an object use `lv_gridnav_add(cont, flags)`.
 
 `flags` control the behavior of gridnav:
-- `LV_GRIDNAV_CTRL_NONE` Default settings 
-- `LV_GRIDNAV_CTRL_ROLLOVER`  If there is no next/previous object in a direction, 
-the focus goes to the object in the next/previous row (on left/right keys) or first/last row (on up/down keys 
+- `LV_GRIDNAV_CTRL_NONE` Default settings
+- `LV_GRIDNAV_CTRL_ROLLOVER`  If there is no next/previous object in a direction,
+the focus goes to the object in the next/previous row (on left/right keys) or first/last row (on up/down keys
 - `LV_GRIDNAV_CTRL_SCROLL_FIRST` If an arrow is pressed and the focused object can be scrolled in that direction
-then it will be scrolled instead of going to the next/previous object.  If there is no more room for scrolling the next/previous object will be focused normally 
+then it will be scrolled instead of going to the next/previous object.  If there is no more room for scrolling the next/previous object will be focused normally
 
 `lv_gridnav_remove(cont)` Removes gridnav from an object.
 
 ## Focusable objects
 
-An object needs to be clickable or click focusable (`LV_OBJ_FLAG_CLICKABLE` or `LV_OBJ_FLAG_CLICK_FOCUSABLE`) 
+An object needs to be clickable or click focusable (`LV_OBJ_FLAG_CLICKABLE` or `LV_OBJ_FLAG_CLICK_FOCUSABLE`)
 and not hidden (`LV_OBJ_FLAG_HIDDEN`) to be focusable by gridnav.
 
 

docs/others/imgfont.md

@@ -1,5 +1,5 @@
 ```eval_rst
-.. include:: /header.rst 
+.. include:: /header.rst
 :github_url: |github_link_base|/others/imgfont.md
 ```
 ## Image font (imgfont)

docs/others/index.md

@@ -1,5 +1,5 @@
 ```eval_rst
-.. include:: /header.rst 
+.. include:: /header.rst
 :github_url: |github_link_base|/others/index.md
 ```
 # Others
@@ -9,7 +9,7 @@
 
 .. toctree::
    :maxdepth: 1
-   
+
    snapshot
    monkey
    gridnav

docs/others/monkey.md

@@ -1,5 +1,5 @@
 ```eval_rst
-.. include:: /header.rst 
+.. include:: /header.rst
 :github_url: |github_link_base|/others/monkey.md
 ```
 # Monkey

docs/others/snapshot.md

@@ -1,5 +1,5 @@
 ```eval_rst
-.. include:: /header.rst 
+.. include:: /header.rst
 :github_url: |github_link_base|/others/snapshot.md
 ```
 # Snapshot