all: Prune trailing whitespace.

Prune trailing whitespace across the whole project (almost), done
automatically with:

    grep -IUrl --color "[[:blank:]]$" --exclude-dir=.git --exclude=*.exp |\
        xargs sed -i 's/[[:space:]]*$//'

Exceptions:
- Skip third-party code in lib/ and drivers/cc3100/
- Skip generated code in bluetooth_init_cc2564C_1.5.c
- Preserve command output whitespace in docs, eg:
  docs/esp8266/tutorial/repl.rst

Signed-off-by: Phil Howard <phil@gadgetoid.com>

.github/workflows/ports_windows.yml

@@ -56,14 +56,14 @@ jobs:
     - uses: actions/setup-python@v5
       if: matrix.runner == 'windows-2019'
       with:
-        python-version: '3.9' 
+        python-version: '3.9'
     - uses: actions/checkout@v4
     - name: Build mpy-cross.exe
       run: msbuild mpy-cross\mpy-cross.vcxproj -maxcpucount -property:Configuration=${{ matrix.configuration }} -property:Platform=${{ matrix.platform }}
     - name: Update submodules
       run: git submodule update --init lib/micropython-lib
     - name: Build micropython.exe
-      run: msbuild ports\windows\micropython.vcxproj -maxcpucount -property:Configuration=${{ matrix.configuration }} -property:Platform=${{ matrix.platform }} -property:PyVariant=${{ matrix.variant }} 
+      run: msbuild ports\windows\micropython.vcxproj -maxcpucount -property:Configuration=${{ matrix.configuration }} -property:Platform=${{ matrix.platform }} -property:PyVariant=${{ matrix.variant }}
     - name: Get micropython.exe path
       id: get_path
       run: |
@@ -123,7 +123,7 @@ jobs:
         msystem: ${{ matrix.sys }}
         update: true
         install: >-
-          make 
+          make
           mingw-w64-${{ matrix.env }}-gcc
           pkg-config
           python3