Gnu manual reads:
To ignore errors in a recipe line, write a '-' at the beginning of the
line's text (after the initial tab)...
I think it would be good if the implementation changed to allow instead
To ignore errors in a recipe line, write a '-' as the first character
of the line's text (immediately after the initial tab with no other preceding
whitespace)...
This would allow the use of '--' following an initial space after the tab to
serve its usual role introducing an SQL comment, allowing commenting out
selected lines of SQL statement within a HERE string.
~Malcolm