Elide extraneous leading empty lines in code snippets

[Rageking8]

Remove extraneous leading empty lines in code snippets which are rendered, along with the usual metadata changes and some minor drive-by fixes.

[prmerger-automator]

@Rageking8 : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 6243a21:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/c-language/extern-storage-class-specifier.md	✅Succeeded
docs/c-runtime-library/reference/and.md	✅Succeeded
docs/c-runtime-library/reference/bitand.md	✅Succeeded
docs/c-runtime-library/reference/bitor.md	✅Succeeded
docs/c-runtime-library/reference/crtcheckmemory.md	✅Succeeded
docs/c-runtime-library/reference/crtdumpmemoryleaks.md	✅Succeeded
docs/c-runtime-library/reference/kbhit.md	✅Succeeded
docs/c-runtime-library/reference/mkdir-wmkdir.md	✅Succeeded
docs/c-runtime-library/reference/not.md	✅Succeeded
docs/c-runtime-library/reference/or-eq.md	✅Succeeded
docs/c-runtime-library/reference/rmtmp.md	✅Succeeded
docs/c-runtime-library/reference/rotl-rotl64-rotr-rotr64.md	✅Succeeded
docs/c-runtime-library/reference/rtc-numerrors.md	✅Succeeded
docs/code-quality/annotating-structs-and-classes.md	✅Succeeded
docs/cpp/codesnippet/CPP/how-to-create-and-use-shared-ptr-instances_1.cpp	✅Succeeded
docs/cpp/codesnippet/CPP/how-to-create-and-use-shared-ptr-instances_6.cpp	✅Succeeded
docs/cpp/codesnippet/CPP/how-to-create-and-use-unique-ptr-instances_3.cpp	✅Succeeded
docs/cpp/codesnippet/CPP/smart-pointers-modern-cpp_2.cpp	✅Succeeded
docs/linux/deploy-run-and-debug-your-linux-project.md	✅Succeeded
docs/mfc/codesnippet/CPP/accessing-the-embedded-month-calendar-control_2.cpp	✅Succeeded
docs/mfc/codesnippet/CPP/cbitmapbutton-class_3.cpp	✅Succeeded
docs/mfc/reference/codesnippet/CPP/cpagerctrl-class_5.cpp	✅Succeeded

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[prmerger-automator]

PRMerger Results

Issue	Description
Changed Files	This PR contains more than 10 changed files.
Unapproved file extension(s)	This PR contains file types that are not supported in the repo. The only supported file types are jpg, gif, png, json, svg and md.

[Court72]

@TylerMSFT

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[TylerMSFT]

Thank you for the cleanup. It's odd that those blank lines were even in there.

[TylerMSFT]

#sign-off