tests: remove leading spaces from some tags

The threee tags `<name>`, `</name>` and `<command>` were frequently used
with a leading space that this removes. The reason this habbit is so

tests: remove leading spaces from some tags

The threee tags `<name>`, `</name>` and `<command>` were frequently used
with a leading space that this removes. The reason this habbit is so
widespread in testcases is probably that they have been copy and pasted.

Hence, fixing them all now might curb this practice from now on.

Closes #12028

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tidy-up: mostly whitespace nits

- delete completed TODO from `./CMakeLists.txt`.
- convert a C++ comment to C89 in `./CMake/CurlTests.c`.
- delete duplicate EOLs from EOF.
- add

tidy-up: mostly whitespace nits

- delete completed TODO from `./CMakeLists.txt`.
- convert a C++ comment to C89 in `./CMake/CurlTests.c`.
- delete duplicate EOLs from EOF.
- add missing EOL at EOF.
- delete whitespace at EOL (except from expected test results).
- convert tabs to spaces.
- convert CRLF EOLs to LF in GHA yaml.
- text casing fixes in `./CMakeLists.txt`.
- fix a codespell typo in `packages/OS400/initscript.sh`.

Closes #11772

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test719-721: require "proxy" feature present to run

Bug: https://github.com/curl/curl/pull/8223#issuecomment-1005188696
Reported-by: Marc Hörsken

Closes #8226

test719-721: verify SOCKS details

Using the new verify/socks details

socks5: use appropriate ATYP for numerical IP address host names

When not resolving the address locallly (known as socks5h).

Add test 719 and 720 to verify.

Reported-by: Pe

socks5: use appropriate ATYP for numerical IP address host names

When not resolving the address locallly (known as socks5h).

Add test 719 and 720 to verify.

Reported-by: Peter Piekarski
Fixes #8216
Closes #8217

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