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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test718: edited slightly to return better HTTP

Since hyper is picky and won't play ball otherwise.

Bug: https://github.com/hyperium/hyper/issues/2783
Reported-by: Daniel Valenzu

test718: edited slightly to return better HTTP

Since hyper is picky and won't play ball otherwise.

Bug: https://github.com/hyperium/hyper/issues/2783
Reported-by: Daniel Valenzuela
Closes #8614

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http_proxy: only loop on 407 + close if we have credentials

... to fix the retry-loop.

Add test 718 to verify.

Reported-by: Daniel Kurečka
Fixes #6828
Closes #6850