More documentation cleanup

Author: earlephilhower

docs/help.rst

@@ -6,9 +6,10 @@ Posting complete details, in a polite and organized way will get the best
 response.
 
 For bugs in the Core, or to submit patches, please use the
-[GitHub Issues](https://github.com/earlephilhower/arduino-pico/issues) or
-[GitHub Pull Requests](https://github.com/earlephilhower/arduino-pico/pulls)
+`GitHub Issues <https://github.com/earlephilhower/arduino-pico/issues>`_ or
+`GitHub Pull Requests <https://github.com/earlephilhower/arduino-pico/pulls>`_
 
-For general questions/discussions use either [GitHub Discussions](https://github.com/earlephilhower/arduino-pico/discussions)
-or live-chat with [gitter](https://gitter.im/arduino-pico/community)
+For general questions/discussions use either
+`GitHub Discussions <https://github.com/earlephilhower/arduino-pico/discussions>`_
+or live-chat with `gitter.im <https://gitter.im/arduino-pico/community>`_
 

docs/install.rst

@@ -70,12 +70,15 @@ follow the initial procedure of holding the BOOTSEL button down while plugging i
 Uploading Filesystem Images
 ---------------------------
 The onboard flash filesystem for the Pico, LittleFS, lets you upload a filesystem image from the sketch directory for your sketch to use.  Download the needed plugin from
+
 * https://github.com/earlephilhower/arduino-pico-littlefs-plugin/releases
 
 To install, follow the directions in 
+
 * https://github.com/earlephilhower/arduino-pico-littlefs-plugin/blob/master/README.md 
 
 For detailed usage information, please check the repo documentation available at
+
 * https://arduino-pico.readthedocs.io/en/latest/fs.html
 
 Uploading Sketches with Picoprobe

docs/libraries.rst

@@ -10,4 +10,4 @@ the generic versions available in the Library Manager
 
 * `Adafruit GFX Library <https://github.com/Bodmer/Adafruit-GFX-Library>`_ by @Bodmer, 2-20x faster than the standard version on the Pico
 * `Adafruit ILI9341 Library <https://github.com/Bodmer/Adafruit_ILI9341>`_ again by @Bodmer
-* `ESP8266Audio <https://github.com/earlephilhower/ESP8266Audio>_` ported to use the included ``I2S`` library
+* `ESP8266Audio <https://github.com/earlephilhower/ESP8266Audio>`_ ported to use the included ``I2S`` library

docs/sdk.rst

@@ -1,6 +1,8 @@
 Using the Raspberry Pi Pico SDK (PICO-SDK)
 ==========================================
 
+Included SDK
+------------
 A complete copy of the `Raspberry Pi Pico SDK <https://datasheets.raspberrypi.org/pico/raspberry-pi-pico-c-sdk.pdf>`_
 is included with the Arduino core, and all functions in the core are available
 inside the standard link libraries.
@@ -29,6 +31,8 @@ appropriate header as shown below
 libraries are not aware of any changes to the Pico you perform.  So,
 you may break the functionality of certain libraries in doing so.
 
+Multicore (CORE1) Processing
+----------------------------
 **Warning:**  While you may spawn multicore applications on CORE1
 using the SDK, the Arduino core may have issues running properly with
 them.  In particular, anything involving flash writes (i.e. EEPROM,