Clarify.

.github/workflows/ci.yml

@@ -91,8 +91,9 @@ jobs:
 
       # On Windows, a non-blocking pipe might respond (when emulating Unix-y
       # API) with ENOSPC to indicate buffer full. Trial doesn't handle this
-      # well. So, we pipe the output through pipethrough that will hopefully be
-      # able to do the right thing by using Windows APIs.
+      # well, so it breaks test runs. To attempt to solve this, we pipe the
+      # output through pipethrough that will hopefully be able to do the right
+      # thing by using Windows APIs.
       - name: Run tox for corresponding Python version
         if: ${{ contains(matrix.os, 'windows') }}
         run: |