This was using the wrong quote style (single instead of double):

        # 10
        cat <<-\
        EOF
        this is $double
        EOF

Signed-off-by: Felipe Contreras <[email protected]>
---
 runtime/syntax/sh.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/runtime/syntax/sh.vim b/runtime/syntax/sh.vim
index a15fe8fe3..35e11f0c7 100644
--- a/runtime/syntax/sh.vim
+++ b/runtime/syntax/sh.vim
@@ -405,7 +405,7 @@ ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc06 
start="<<-\s*\"\z([^"]
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc07 
start="<<\s*\\\_$\_s*\z([^ \t'"|>]\+\)"      matchgroup=shHereDoc07 
end="^\z1\s*$"   contains=@shDblQuoteList
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc08 
start="<<\s*\\\_$\_s*'\z([^\t|>]\+\)'"       matchgroup=shHereDoc08 
end="^\z1\s*$"
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc09 
start="<<\s*\\\_$\_s*\"\z([^\t|>]\+\)\""     matchgroup=shHereDoc09 
end="^\z1\s*$"
-ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc10 
start="<<-\s*\\\_$\_s*\z([^ \t|>]\+\)"       matchgroup=shHereDoc10 
end="^\s*\z1\s*$"
+ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc10 
start="<<-\s*\\\_$\_s*\z([^ \t|>]\+\)"       matchgroup=shHereDoc10 
end="^\s*\z1\s*$"        contains=@shDblQuoteList
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc11 
start="<<-\s*\\\_$\_s*\\\z([^ \t|>]\+\)"     matchgroup=shHereDoc11 
end="^\s*\z1\s*$"
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc12 
start="<<-\s*\\\_$\_s*'\z([^']\+\)'"         matchgroup=shHereDoc12 
end="^\s*\z1\s*$"
 ShFoldHereDoc syn region shHereDoc matchgroup=shHereDoc13 
start="<<-\s*\\\_$\_s*\"\z([^"]\+\)\""       matchgroup=shHereDoc13 
end="^\s*\z1\s*$"
-- 
2.28.0

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