Fix code example formatting

[vmbrasseur]

Reported by @tardispackrat via email:

On https://github.com/vmbrasseur/IAS3API/blob/master/examples/curl-create_video_item_with_metadata.md should the code example be formatted? Looks... off. Ditto: https://github.com/vmbrasseur/IAS3API/blob/master/examples/curl-update_metadata.md And again: https://github.com/vmbrasseur/IAS3API/blob/master/examples/curl-upload_text_item.md And again: https://github.com/vmbrasseur/IAS3API/blob/master/examples/curl-upload_to_existing_item.md And again: https://github.com/vmbrasseur/IAS3API/blob/master/examples/curl-upload_video_item.md And again: https://github.com/vmbrasseur/IAS3API/blob/master/examples/curl-upload_video_with_metadata.md

Huh. Not sure what happened there. I'll have a look.

[vmbrasseur]

Ah!

The problem is that the leading whitespace (which tells MD to display as a code) is a combo of tabs and spaces.

[vmbrasseur]

Hrm. That commit doesn't seem to have fixed it. It cleaned up plenty of OTHER stuff, but not the code formatting.

Testing an example here:

curl --location \
    --header 'x-archive-ignore-preexisting-bucket:1' \
    --header 'x-archive-meta01-collection:opensource' \
    --header 'x-archive-meta-mediatype:texts' \
    --header 'x-archive-meta-title:Fancy new title' \
    --header "authorization: LOW $accesskey:$secret" \
    --upload-file /dev/null \
http://s3.us.archive.org/sam-s3-test-08

Interesting. That looks good in this preview but not in the final doc. This example was cut&pasted from the latest version of curl-update_metadata.md.

[vmbrasseur]

It may be some odd MD parser bug having to do with an ordered list immediately followed by a code block. When I add a horizontal rule between the two the code block formats correctly.

[vmbrasseur]

Confirmed: these two commits fixed the problem.

Thank you, @tardispackrat, for spotting this!