Junos: add empty lines

[dhalperi]

Avoids flattening issues when there's a bare semicolon after a comment.

[batfish-bot]

This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.72%. Comparing base (24e1b8d) to head (e6da691).
Report is 56 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9236      +/-   ##
==========================================
- Coverage   72.73%   72.72%   -0.01%     
==========================================
  Files        3314     3314              
  Lines      170019   170019              
  Branches    20048    20048              
==========================================
- Hits       123657   123643      -14     
- Misses      37199    37211      +12     
- Partials     9163     9165       +2     

see 4 files with indirect coverage changes

[SLarkworthy]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @dhalperi)