style/Document: remove unnecessary trailing whitespace

N/A

Signed-off-by: chao.an <[email protected]>

Author: anchao

DISCLAIMER-WIP

@@ -1,20 +1,20 @@
-Apache NuttX is an effort undergoing incubation at The Apache Software Foundation (ASF), 
-sponsored by the Apache Incubator. Incubation is required of all newly accepted projects 
-until a further review indicates that the infrastructure, communications, and decision 
-making process have stabilized in a manner consistent with other successful ASF projects. 
-While incubation status is not necessarily a reflection of the completeness or stability 
+Apache NuttX is an effort undergoing incubation at The Apache Software Foundation (ASF),
+sponsored by the Apache Incubator. Incubation is required of all newly accepted projects
+until a further review indicates that the infrastructure, communications, and decision
+making process have stabilized in a manner consistent with other successful ASF projects.
+While incubation status is not necessarily a reflection of the completeness or stability
 of the code, it does indicate that the project has yet to be fully endorsed by the ASF.
 
-Some of the incubating project's releases may not be fully compliant with ASF policy. For 
-example, releases may have incomplete or un-reviewed licensing conditions. What follows is 
-a list of known issues the project is currently aware of (note that this list, by definition, 
-is likely to be incomplete): 
+Some of the incubating project's releases may not be fully compliant with ASF policy. For
+example, releases may have incomplete or un-reviewed licensing conditions. What follows is
+a list of known issues the project is currently aware of (note that this list, by definition,
+is likely to be incomplete):
 
  * Releases may have incomplete licensing conditions.
  * Some ASF files still have BSD headers.  Most of the top contributors have signed an ICLA and
    we are working on updating the headers and getting approvals from other copyright holders.
 
 If you are planning to incorporate this work into your product/project, please be aware that
-you will need to conduct a thorough licensing review to determine the overall implications of 
-including this work. For the current status of this project through the Apache Incubator 
+you will need to conduct a thorough licensing review to determine the overall implications of
+including this work. For the current status of this project through the Apache Incubator
 visit: https://incubator.apache.org/projects/nuttx.html

LICENSE

@@ -199,7 +199,7 @@
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
-   
+
 ------------------------------------------------------------------------------
 
 uIP
@@ -353,24 +353,24 @@ apps/testing/scanftest/scanftest_main.c
   Derives from the cc65 Project which has a zlib license:
 
     Copyright (C) 2005-01-26, Greg King (https://github.com/cc65)
-  
+
     Original License:
     This software is provided 'as-is', without any express or implied warranty.
     In no event will the authors be held liable for any damages arising from
     the use of this software.
-  
+
     Permission is granted to anyone to use this software for any purpose,
     including commercial applications, and to alter it and redistribute it
     freely, subject to the following restrictions:
-  
+
     1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software in
     a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
-  
+
     2. Altered source versions must be plainly marked as such, and must not
     be misrepresented as being the original software.
-  
+
     3. This notice may not be removed or altered from any source distribution.
 
 apps/webserver
@@ -382,11 +382,11 @@ apps/webserver
 
     Copyright (c) 2001, Adam Dunkels.
     All rights reserved.
-   
+
     Redistribution and use in source and binary forms, with or without
     modification, are permitted provided that the following conditions
     are met:
-   
+
     1. Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
     2. Redistributions in binary form must reproduce the above copyright
@@ -398,7 +398,7 @@ apps/webserver
     4. The name of the author may not be used to endorse or promote
     products derived from this software without specific prior
     written permission.
-   
+
     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -447,7 +447,7 @@ canutils/candump
 
   Includes five dual licensed third part files from Volkswagon with
   licensing as follows (Copyright dates vary from file-to-file):
-  
+
     SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
 
     Copyright (c) 2002-2009 Volkswagen Group Electronic Research

README.md

@@ -162,7 +162,7 @@ project. One must:
 
 Q: Has anyone come up with a tidy way to build NuttX with board- specific pieces
    outside the source tree?
- 
+
 A: Here are three:
 
    1) There is a make target called `make export`. It will build NuttX, then
@@ -226,9 +226,9 @@ A: Here are three:
       You could, for example, create a script called `install.sh` that installs
       a custom application, configuration, and board specific directory:
 
-      a) Copy `MyBoard` directory to `boards/MyBoard`.  
-      b) Add a symbolic link to `MyApplication` at `apps/external`.  
-      c) Configure NuttX, usually by:  
+      a) Copy `MyBoard` directory to `boards/MyBoard`.
+      b) Add a symbolic link to `MyApplication` at `apps/external`.
+      c) Configure NuttX, usually by:
 
       ```bash
       tools/configure.sh MyBoard:MyConfiguration

examples/README.md

@@ -1042,9 +1042,9 @@ the display. This only works for `RGB23` (`888`), `RGB16` (`656`), `RGB8`
 
 How was that run-length encoded image produced?
 
-1. I used GIMP output the image as a `.c` file.  
-2. I added some C logic to palette-ize the RGB image in the GIMP `.c` file.  
-3. Then I add some simple run-length encoding to palette-ized image.  
+1. I used GIMP output the image as a `.c` file.
+2. I added some C logic to palette-ize the RGB image in the GIMP `.c` file.
+3. Then I add some simple run-length encoding to palette-ized image.
 
 But now there is a tool that can be found in the NxWidgets package at
 `NxWidgets/tools/bitmap_converter.py` that can be used to convert any graphics

examples/json/README.md

@@ -133,18 +133,18 @@ Hopefully we can agree that's not a lot of code? There's no overhead, no
 unnecessary setup. Look at test.c for a bunch of nice examples, mostly all
 ripped off the json.org site, and a few from elsewhere.
 
-What about manual mode? First up you need some detail.  
-Let's cover how the cJSON objects represent the JSON data.  
-cJSON doesn't distinguish arrays from objects in handling; just type.  
+What about manual mode? First up you need some detail.
+Let's cover how the cJSON objects represent the JSON data.
+cJSON doesn't distinguish arrays from objects in handling; just type.
 Each cJSON has, potentially, a child, siblings, value, a name.
 
-The root object has: Object Type and a Child  
-The Child has name "name", with value "Jack ("Bee") Nimble", and a sibling:  
-Sibling has type Object, name "format", and a child.  
-That child has type String, name "type", value "rect", and a sibling:  
-Sibling has type Number, name "width", value 1920, and a sibling:  
-Sibling has type Number, name "height", value 1080, and a sibling:  
-Sibling hs type False, name "interlace", and a sibling:  
+The root object has: Object Type and a Child
+The Child has name "name", with value "Jack ("Bee") Nimble", and a sibling:
+Sibling has type Object, name "format", and a child.
+That child has type String, name "type", value "rect", and a sibling:
+Sibling has type Number, name "width", value 1920, and a sibling:
+Sibling has type Number, name "height", value 1080, and a sibling:
+Sibling hs type False, name "interlace", and a sibling:
 Sibling has type Number, name "frame rate", value 24
 
 Here's the structure:

graphics/pdcurs34/pdcurses/README.md

@@ -13,5 +13,5 @@ The files in this directory are released to the Public Domain.
 
 ## Acknowledgements
 
-The panel library was originally provided by  
+The panel library was originally provided by
 Warren Tucker <[email protected]>

nshlib/README.md

@@ -246,11 +246,11 @@ The contents of the `/etc` directory are retained in the file
 `include/arch/board/rcS.template`). In order to modify the start-up behavior,
 there are three things to study:
 
-1. Configuration Options. 
+1. Configuration Options.
    The additional `CONFIG_NSH_ROMFSETC` configuration options discussed in the
    final section of this README.
 
-2. `tools/mkromfsimg.sh` Script. 
+2. `tools/mkromfsimg.sh` Script.
    The script `tools/mkromfsimg.sh` creates `nsh_romfsimg.h`. It is not
    automatically executed. If you want to change the configuration settings
    associated with creating and mounting the `/tmp` directory, then it will be
@@ -281,7 +281,7 @@ All of the startup-behavior is contained in `rcS.template`. The role of
 
 ## Simple Commands
 
-- `[ <expression> ]`  
+- `[ <expression> ]`
   `test <expression>`
 
    These are two alternative forms of the same command. They support evaluation
@@ -313,8 +313,8 @@ All of the startup-behavior is contained in `rcS.template`. The role of
                     integer -lt integer | integer -ne integer
    ```
 
-- `addroute <target> [<netmask>] <router>`  
-  `addroute default <ipaddr> <interface>`  
+- `addroute <target> [<netmask>] <router>`
+  `addroute default <ipaddr> <interface>`
 
   This command adds an entry in the routing table. The new entry
   will map the IP address of a router on a local network(`<router>`)
@@ -343,17 +343,17 @@ All of the startup-behavior is contained in `rcS.template`. The role of
 
   Access the OS ARP table.
 
-  - `-a <ipaddr>`  
+  - `-a <ipaddr>`
      Will show the hardware address that the IP address `<ipaddr>` is mapped to.
 
-  - `-d <ipaddr>`  
+  - `-d <ipaddr>`
      Will delete the mapping for the IP address `<ipaddr>` from the ARP table.
 
-  - `-s <ipaddr> <hwaddr>`  
+  - `-s <ipaddr> <hwaddr>`
      Will set (or replace) the mapping of the IP address `<ipaddr>` to the
      hardware address `<hwaddr>`.
 
-  - `-t`  
+  - `-t`
      Will dump the entire content of the ARP table. This option is only
      available if `CONFIG_NETLINK_ROUTE` is enabled.
 
@@ -632,21 +632,21 @@ All of the startup-behavior is contained in `rcS.template`. The role of
   Use TFTP to copy the file at `<remote-address>` from the host whose IP
   address is identified by `<ip-address>`. Other options:
 
-  - `-f <local-path>`  
+  - `-f <local-path>`
     The file will be saved relative to the current working directory unless
     `<local-path>` is provided.
-  - `-b|-n`  
+  - `-b|-n`
     Selects either binary (_octet_) or text (_netascii_) transfer mode. Default:
     text.
 
 - `help [-v] [<cmd>]`
 
   Presents summary information about NSH commands to console. Options:
 
-  - `-v`  
+  - `-v`
     Show verbose output will full command usage.
 
-  - `<cmd>`  
+  - `<cmd>`
     Show full command usage only for this command.
 
 - `hexdump <file or device>`
@@ -838,9 +838,9 @@ All of the startup-behavior is contained in `rcS.template`. The role of
 
 - `md5 [-f] <string or filepath>`
 
-- `mb <hex-address>[=<hex-value>][ <hex-byte-count>]`  
-  `mh <hex-address>[=<hex-value>][ <hex-byte-count>]`  
-  `mw <hex-address>[=<hex-value>][ <hex-byte-count>]`  
+- `mb <hex-address>[=<hex-value>][ <hex-byte-count>]`
+  `mh <hex-address>[=<hex-value>][ <hex-byte-count>]`
+  `mw <hex-address>[=<hex-value>][ <hex-byte-count>]`
 
   Access memory using byte size access (`mb`), 16-bit accesses (`mh`),
   or 32-bit access (`mw`). In each case,
@@ -922,7 +922,7 @@ All of the startup-behavior is contained in `rcS.template`. The role of
   device driver. NSH provides this command to access the `mkfifo()` NuttX API.
 
   **Example**:
-  
+
   ```
   nsh> ls -l /dev
   /dev:
@@ -971,7 +971,7 @@ All of the startup-behavior is contained in `rcS.template`. The role of
   command and mounted using the `mount` command.
 
   **Example**:
-  
+
   ```
   nsh> mkrd 1024
   nsh> mkfatfs /dev/ram0
@@ -1040,7 +1040,7 @@ All of the startup-behavior is contained in `rcS.template`. The role of
     /mnt/fs type vfat
   ```
 
-- `mv <old-path> <new-path>`  
+- `mv <old-path> <new-path>`
 
   Rename the file object at `<old-path>` to `<new-path>`. Both paths must
   reside in the same mounted file system.
@@ -1110,11 +1110,11 @@ All of the startup-behavior is contained in `rcS.template`. The role of
   Copy the file at <local-address> to the host whose IP address is
   identified by <ip-address>. Other options:
 
-  - `-f <remote-path>`  
+  - `-f <remote-path>`
     The file will be saved with the same name on the host unless
     unless `<local-path>` is provided.
 
-  - `-b|-n`  
+  - `-b|-n`
      Selects either binary (_octet_) or test (_netascii_) transfer
      mode. Default: text.
 
@@ -1502,7 +1502,7 @@ There are several built-in appliations in the `apps/` repository. No attempt is
 made here to enumerate all of them. But a few of the more common built- in
 applications are listed below.
 
-- `ping [-c <count>] [-i <interval>] <ip-address>`  
+- `ping [-c <count>] [-i <interval>] <ip-address>`
   `ping6 [-c <count>] [-i <interval>] <ip-address>`
 
   Test the network communication with a remote peer. Example:
@@ -1579,7 +1579,7 @@ mkfatfs   | !`CONFIG_DISABLE_MOUNTPOINT` && `CONFIG_FSUTILS_MKFATFS`
 mkfifo    | `CONFIG_PIPES` && `CONFIG_DEV_FIFO_SIZE` > 0
 mkrd      | !`CONFIG_DISABLE_MOUNTPOINT`
 mount     | !`CONFIG_DISABLE_MOUNTPOINT`
-mv        | !`CONFIG_DISABLE_MOUNTPOINT` || !`CONFIG_DISABLE_PSEUDOFS_OPERATIONS` 
+mv        | !`CONFIG_DISABLE_MOUNTPOINT` || !`CONFIG_DISABLE_PSEUDOFS_OPERATIONS`
 nfsmount  | !`CONFIG_DISABLE_MOUNTPOINT` && `CONFIG_NET` && `CONFIG_NFS`
 nslookup  | `CONFIG_LIBC_NETDB` && `CONFIG_NETDB_DNSCLIENT`
 password  | !`CONFIG_DISABLE_MOUNTPOINT` && `CONFIG_NSH_LOGIN_PASSWD`
@@ -1675,7 +1675,7 @@ The behavior of NSH can be modified with the following settings in the
 - `CONFIG_NSH_READLINE` – Selects the minimal implementation of `readline()`.
   This minimal implementation provides on backspace for command line editing.
 
-- `CONFIG_NSH_CLE`  
+- `CONFIG_NSH_CLE`
 
   Selects the more extensive, EMACS-like command line editor. Select this option
   only if (1) you don't mind a modest increase in the FLASH footprint, and (2)
@@ -1703,7 +1703,7 @@ The behavior of NSH can be modified with the following settings in the
   this feature to save a little memory on FLASH challenged platforms. Default:
   `n`
 
-- `CONFIG_NSH_CMDPARMS`  
+- `CONFIG_NSH_CMDPARMS`
 
   If selected, then the output from commands, from file applications, and from
   NSH built-in commands can be used as arguments to other commands. The entity
@@ -1727,7 +1727,7 @@ The behavior of NSH can be modified with the following settings in the
 - `CONFIG_NSH_MAXARGUMENTS` – The maximum number of NSH command arguments.
   Default: `6`
 
-- `CONFIG_NSH_ARGCAT`  
+- `CONFIG_NSH_ARGCAT`
 
   Support concatenation of strings with environment variables or command
   output. For example:
@@ -1743,7 +1743,7 @@ The behavior of NSH can be modified with the following settings in the
   footprint results but then also only simple environment variables like `$FOO`
   can be used on the command line.
 
-- `CONFIG_NSH_VARS`  
+- `CONFIG_NSH_VARS`
 
   By default, there are no internal NSH variables. NSH will use OS environment
   variables for all variable storage. If this option, NSH will also support
@@ -1765,7 +1765,7 @@ The behavior of NSH can be modified with the following settings in the
   `unset <a>`      | Unsets environment var `a`.      | Unsets both environment var and NSH var `a`.
   `export <a> <b>` | Causes an error.                 | Unsets NSH var `a`. Sets environment var `a` to `b`.
   `export <a>`     | Causes an error.                 | Sets environment var `a` to NSH var `b` (or `""`). <br> Unsets local var `a`.
-  `env`            | Lists all environment variables. | Lists all environment variables (only).              
+  `env`            | Lists all environment variables. | Lists all environment variables (only).
 
 - `CONFIG_NSH_QUOTE` – Enables back-slash quoting of certain characters within
   the command. This option is useful for the case where an NSH script is used to
@@ -1816,11 +1816,11 @@ The behavior of NSH can be modified with the following settings in the
   if `CONFIG_USBDEV` is defined, then a USB serial device may, instead, be used
   if the one of the following are defined:
 
-  - `CONFIG_PL2303` and `CONFIG_PL2303_CONSOLE`  
+  - `CONFIG_PL2303` and `CONFIG_PL2303_CONSOLE`
     Sets up the Prolifics PL2303 emulation as a console device at
     `/dev/console`.
 
-  - `CONFIG_CDCACM` and `CONFIG_CDCACM_CONSOLE`  
+  - `CONFIG_CDCACM` and `CONFIG_CDCACM_CONSOLE`
     Sets up the CDC/ACM serial device as a console device at `/dev/console`.
 
   - `CONFIG_NSH_USBCONSOLE` – If defined, then the an arbitrary USB device may

system/trace/README.md

@@ -1,4 +1,4 @@
-System / `trace` Task Tracer
-============================
-
-See https://nuttx.apache.org/docs/latest/guides/tasktraceuser.html
+System / `trace` Task Tracer
+============================
+
+See https://nuttx.apache.org/docs/latest/guides/tasktraceuser.html