[issue38351] Modernize email example from %-formatting to f-string

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

>  (Not that I can think of others off the top of my head.)

For the most part, templating examples can be switched to the .format() style but shouldn't be switched to f-strings.  The former technique is still necessary if someone wants to move templates to an external file or if they need to use gettext() i18n, f-strings don't work well in the latter case.

Also note, there are no plans to completely remove old-style formatting.  AFAICT, it will be around forever, so people still need to see some examples of each.

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nosy: +rhettinger

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<https://bugs.python.org/issue38351>
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