enhancement(external docs): Update S3 source example

[maxknee]

This PR updates the example to make the regex a one-liner so users can copy-paste and doesn't cause their configs to error.

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[lucperkins]

@maxknee You are quite right that this config won't work if copy-pasted! The issue, as you've rightly pointed out, is that this doesn't work as a multi-line string. I think the solution that we would prefer, however, is to keep this as a multi-line string for the sake of readability but fix the TOML syntax. This should do the trick:

regex = '''
  (?x)^
  (?P<type>[\\w]+)[ ]
  (?P<timestamp>[\\w:.-]+)[ ]
  (?P<elb>[^\\s]+)[ ]
  (?P<client_host>[\\d.:-]+)[ ]
  (?P<target_host>[\\d.:-]+)[ ]
  (?P<request_processing_time>[\\d.-]+)[ ]
  (?P<target_processing_time>[\\d.-]+)[ ]
  (?P<response_processing_time>[\\d.-]+)[ ]
  (?P<elb_status_code>[\\d-]+)[ ]
  (?P<target_status_code>[\\d-]+)[ ]
  (?P<received_bytes>[\\d-]+)[ ]
  (?P<sent_bytes>[\\d-]+)[ ]
  "(?P<request_method>[\\w-]+)[ ]
  (?P<request_url>[^\\s]+)[ ]
  (?P<request_protocol>[^"\\s]+)"[ ]
  "(?P<user_agent>[^"]+)"[ ]
  (?P<ssl_cipher>[^\\s]+)[ ]
  (?P<ssl_protocol>[^\\s]+)[ ]
  (?P<target_group_arn>[\\w.:/-]+)[ ]
  "(?P<trace_id>[^\\s"]+)"[ ]
  "(?P<domain_name>[^\\s"]+)"[ ]
  "(?P<chosen_cert_arn>[\\w:./-]+)"[ ]
  (?P<matched_rule_priority>[\\d-]+)[ ]
  (?P<request_creation_time>[\\w.:-]+)[ ]
  "(?P<actions_executed>[\\w,-]+)"[ ]
  "(?P<redirect_url>[^"]+)"[ ]
  "(?P<error_reason>[^"]+)"
'''

Would you be willing to perhaps verify that this works locally and update your PR?

[maxknee]

Yep! one sec!

[maxknee]

it works!

[jszwedko]

Thanks @maxknee !