chore: cleanup

[thelostone-mc]

Description

• chore: {%if%} -> {% if %}, {%endif%} -> {% endif %}, {%elif%} -> {% elif %}
• update 2018 -> 2020

[danlipert]

Noice! note - I didn't actually review this PR lol

[codecov]

Codecov Report

Merging #5701 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5701      +/-   ##
==========================================
+ Coverage   30.02%   30.05%   +0.02%     
==========================================
  Files         254      254              
  Lines       21586    21586              
  Branches     3138     3138              
==========================================
+ Hits         6482     6488       +6     
+ Misses      14828    14822       -6     
  Partials      276      276

Impacted Files	Coverage Δ
app/app/thumbnail_processors.py	33.33% <ø> (ø)	⬆️
app/manage.py	0% <ø> (ø)	⬆️
app/kudos/templatetags/kudos_extras.py	70% <ø> (ø)	⬆️
app/marketing/views.py	11.27% <ø> (ø)	⬆️
app/marketing/management/commands/pull_github.py	0% <ø> (ø)	⬆️
...ashboard/management/commands/setup_grants_clr_3.py	0% <ø> (ø)	⬆️
app/app/settings.py	80.2% <ø> (ø)	⬆️
app/dashboard/management/commands/calc_profile.py	0% <ø> (ø)	⬆️
.../dashboard/management/commands/migrate_profiles.py	0% <ø> (ø)	⬆️
app/grants/templatetags/grants_extra.py	100% <ø> (ø)	⬆️
... and 105 more

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