Fix incorrect formatting of ending expression after heredoc #6127
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Fixes #6121
It was a bit tricky to fix because the formatter works like this:
1
or1 + 2
, the formatter traverses that and outputs/fixes that (corrects whitespace, etc.), but it doesn't insert a newlineThat's why a newline is now inserted after writing a heredoc, and in some places I check that if a newline was already printed, don't print it again.
The issue also happened with other closing stuff, like
}}
,]
,}
, not only%}
.