Use f-strings

[eumiro]

No description provided.

[codecov]

Codecov Report

Merging #87 (80887f4) into master (f81554d) will not change coverage.
The diff coverage is 50.00%.

@@           Coverage Diff           @@
##           master      #87   +/-   ##
=======================================
  Coverage   95.09%   95.09%           
=======================================
  Files           7        7           
  Lines        1284     1284           
  Branches      115      115           
=======================================
  Hits         1221     1221           
  Misses         43       43           
  Partials       20       20           

Impacted Files	Coverage Δ
tnefparse/mapi.py	80.98% <0.00%> (ø)
tnefparse/tnef.py	92.83% <33.33%> (ø)
tnefparse/codepage.py	80.95% <50.00%> (ø)
tnefparse/cmdline.py	96.25% <100.00%> (ø)

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[jugmac00]

Thanks for your contribution!

We had a short discussion about the usage of f-strings in #79 (comment) and as @petri merged the PR (with added f-strings), I think there is a consensus now to go with f-strings :-)

Quite some lines you changed are currently without coverage.

It would be awesome to add the missing coverage with this PR.

And also, as @petri suggested in another issue, please add a change log entry.