(shell/bash) Wrong syntax highlight after a heredoc, until the end of the line. #4377

Describe the issue

hljs assumes that what comes after a heredoc is a string.

However, the end of the line may be the continuation of the command line.

Which language seems to have the issue?

shell, bash

Are you using highlight or highlightAuto?

highlight

Sample Code to Reproduce

echo "ok" <<-EOF | cat
	Hello
EOF

Expected behavior

cat should be highlighted as a command instead of being highlighted as a string.