package/ci: doc++

package/ci/appveyor.yml

@@ -53,6 +53,7 @@ environment:
     APPVEYOR_JOB_NAME: windows-msvc2019-clang
     CONFIGURATION: Debug
     ENABLE_VULKAN: ON
+  # This one collects code coverage using Clang's --coverage and grcov
   - TARGET: desktop
     COMPILER: msvc-clang
     PLATFORM: x64
@@ -90,6 +91,7 @@ environment:
     APPVEYOR_JOB_NAME: windows-conforming-msvc2022
     CONFIGURATION: Debug
     ENABLE_VULKAN: ON
+  # This one collects code coverage using GCC's --coverage and grcov
   - TARGET: desktop
     COMPILER: mingw
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017

package/ci/circleci.yml

@@ -564,7 +564,7 @@ jobs:
       # disrepair. Additionally it reports an ODR violation for
       # GL::defaultFramebuffer due to complex yet-unresolved reasons explained
       # in https://github.com/mosra/magnum/pull/565. (Also STUPID yml
-      # interprets unquoted ON as a boolean.)
+      # interprets unquoted OFF as a boolean.)
       # TODO retry when upgrading to a newer OS version or when that PR is
       #   merged
       TARGET_EGL: "OFF"