The heredoc used <<EOF (unquoted), causing the \ inside it
to be executed during installation. This embedded the entire cronmaster.sh
source (~250 lines) into the update script, which contained backtick-style
constructs that caused 'unexpected EOF while looking for matching backtick'
at line 44 when the update script was later run.
Use <<'EOF' so the literal \ text is written to the file.
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