Extend documenation of formatFloat() (#5799)
Extend documenation of formatFloat() (#5799)

Added line: "If ``precision == 0``, it tries to format it nicely." (copied from formatBiggestFloat())
tulayang/Nim,tulayang/Nim,tulayang/Nim,dom96/Nim,dom96/Nim,russpowers/Nim,tulayang/Nim,russpowers/Nim,russpowers/Nim,tulayang/Nim,dom96/Nim,dom96/Nim,dom96/Nim,tulayang/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim