Marko 5: Fix repeated render body

[DylanPiercey]

Description

Fixes issue where dynamic attribute tags are used with default body content.

Checklist:

• I have read the CONTRIBUTING document and have signed (or will sign) the CLA.
• I have updated/added documentation affected by my changes.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Merging #1635 (90c9927) into next (9d31667) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             next    #1635      +/-   ##
==========================================
+ Coverage   90.46%   90.49%   +0.03%     
==========================================
  Files         217      217              
  Lines        6567     6588      +21     
==========================================
+ Hits         5941     5962      +21     
  Misses        626      626              

Impacted Files	Coverage Δ
...ckages/translator-default/src/tag/attribute-tag.js	100.00% <100.00%> (ø)
packages/translator-default/src/tag/util.js	100.00% <100.00%> (ø)

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