Fix encoding issue with commit message file

The commitMsg.txt file created by Powershell started with an unknown
character that git could not consume. This error is not easy to
detect with powershell but shows up in gitbash for windows when using
the 'cat' command to inspect the commitMsg.txt file.

.github/workflows/generate.yml

@@ -13,9 +13,10 @@ jobs:
       run:
         shell: powershell
     steps:
-    - name: Current dir
+    - name: Current dir and PS version
       run: |
         'CurrentDir: ' + (Get-Location)
+         $PSVersionTable.PSVersion
     - name: Checkout source nvda-microsoft-ui-uiautomation
       uses: actions/checkout@v3
       with:
@@ -29,7 +30,8 @@ jobs:
         New-Item -ItemType "directory" "build"
         Set-Location source
         ./build.ps1 -SubmoduleDir "microsoft-ui-uiautomation" -OutDir "../build"
-    - name: Checkout gen branch into separate folder
+        tree ../build /f
+    - name: Checkout main-out branch into separate folder
       uses: actions/checkout@v3
       with:
         repository: nvaccess/nvda-microsoft-ui-uiautomation
@@ -38,21 +40,26 @@ jobs:
     - name: Empty destination directory
       # empty the 'out' folder directory, but don't delete .git, or the top level directory.
       run: |
-        Get-ChildItem gen -Exclude .git | Remove-Item
+        Get-Location
+        tree out /f
+        Get-ChildItem out -Exclude .git | Remove-Item
+        tree out /f
     - name: Copy files
       run: |
+        Get-Location
         ./source/copyFiles.ps1 -RepoRoot "source" -BuildDir "build" -DestDir "out"
+        tree out /f
     - name: Commit and push
       run: |
         # this is a git '--pretty=format' string
         # %h is SHA, %n is newline,
         # %s is commit message subject, %b is commit message body
         $COMMIT_FORMAT="Generated from %h%n%nCommit message:%n%s%n%b"
-        Write-Output $COMMIT_FORMAT
         $prettyArg = $("--pretty=format:"+$COMMIT_FORMAT)
-        Write-Output $prettyArg
         Set-Location source
-        git log -1 HEAD $prettyArg > ../commitMsg.txt
+        $(git log -1 HEAD $prettyArg) | out-file -FilePath ../commitMsg.txt -Encoding ASCII
+        Get-ChildItem ../
+        Get-Content ../commitMsg.txt
         Set-Location ../out
         $status = $(git status --porcelain)
         if($status) {
@@ -62,7 +69,8 @@ jobs:
           git config user.name github-actions
           git config user.email [email protected]
           git add .
-          git commit -F ../commitMsg.txt
+          git status --short
+          git commit --file="../commitMsg.txt"
           git push
         } else {
           Write-Output "No changes"