PortIn.h: Documentation improvements only * Improve function and parameter descriptions * Improve clarity of the example
PortIn.h: Documentation improvements only
* Improve function and parameter descriptions
* Improve clarity of the example

mbedmicro/mbed,andcor02/mbed-os,andcor02/mbed-os,kjbracey-arm/mbed,andcor02/mbed-os,kjbracey-arm/mbed,mbedmicro/mbed,andcor02/mbed-os,kjbracey-arm/mbed,mbedmicro/mbed,mbedmicro/mbed,kjbracey-arm/mbed,andcor02/mbed-os,andcor02/mbed-os,mbedmicro/mbed