Fix misleading error message for not-equal predicate

[eyupcanakman]

A failing != assert printed the same value for actual and expected, so the message did not show what the response should have matched.

The expected line now shows not <value>, matching the output already used for not ==.

Fixes #2841

[jcamiel]

Thanks for the PR @eyupcanakman we're looking into it asap

[fabricereix]

Thanks @eyupcanakman

[fabricereix]

/accept

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[hurl-bot]

🔨 Auto rebase from Orange-OpenSource/hurl/master succeeds, eyupcanakman/hurl/fix/not-equal-error-message-2841 now embeds these commits:

• 9e91a78 Update actions

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[hurl-bot]

✅ Pull request merged with fast forward by fabricereix..

# List of commits merged from eyupcanakman/hurl/fix/not-equal-error-message-2841 branch into Orange-OpenSource/hurl/master branch:

• 23ed61e Fix misleading error message for not-equal predicate

[Thomasdezeeuw]

Thanks @eyupcanakman