Abort outro if block is recreated

[Rich-Harris]

fixes #1425

[codecov-io]

Codecov Report

Merging #1428 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1428      +/-   ##
==========================================
+ Coverage   91.06%   91.09%   +0.02%     
==========================================
  Files         122      122              
  Lines        4489     4491       +2     
  Branches     1405     1406       +1     
==========================================
+ Hits         4088     4091       +3     
  Misses        158      158              
+ Partials      243      242       -1

Impacted Files	Coverage Δ
src/compile/nodes/IfBlock.ts	96.57% <100%> (+0.02%)	⬆️
src/compile/nodes/AwaitBlock.ts	96.34% <100%> (+0.04%)	⬆️
src/compile/nodes/Element.ts	93.13% <100%> (+0.26%)	⬆️
src/compile/nodes/EachBlock.ts	97.95% <100%> (ø)	⬆️
src/compile/dom/Block.ts	93.06% <100%> (-0.07%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e1db827...a07c964. Read the comment docs.