[web2py] Nit in manual (= should be ==)?

[MichaelF]

Section 7.8 (SQLFORM.grid and smartgrid) in the description of displaying 
parents and children using grid:

SQLFORM.grid(db.parent,left=db.child.on(db.child.parent=db.parent.id))

The second '=' should be '==' yes?

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