[tor-bugs] #22295 [Metrics/Metrics website]: update metrics-lib tutorials for major version release

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#22295: update metrics-lib tutorials for major version release
-------------------------------------+------------------------------
 Reporter:  iwakeh                   |          Owner:  metrics-team
     Type:  enhancement              |         Status:  merge_ready
 Priority:  Medium                   |      Milestone:
Component:  Metrics/Metrics website  |        Version:
 Severity:  Normal                   |     Resolution:
 Keywords:                           |  Actual Points:
Parent ID:                           |         Points:
 Reviewer:                           |        Sponsor:
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Changes (by iwakeh):

 * status:  needs_review => merge_ready


Comment:

 All changes are fine and identical to the changes for #22734.
 Please find some tiny tweaks [https://gitweb.torproject.org/user/iwakeh
 /metrics-
 web.git/commit/?h=task-22295&id=e9be3f36c35aed29e731568d50556ee630db0ed0
 here].
 Mainly changes to the diffs, which can now be easier copied and pasted and
 applied w/o patch command line options.
 As I tested all sources and patches I also modernized the result examples.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22295#comment:4>
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