use of hyphen in recipes to ignore errors precludes using -- as comment character

[Cook, Malcolm]

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