What rules apply to punctuation for an abbreviation, such as "etc," where another punctuation character follows?
My question is a perfect illustration of itself! That is, should I say
<< such as "etc," where >> or << such as "etc.," where >>
Another example is "etc" followed by a right parenthesis:
<< (lions, tigers, bears, etc) were >> or << (lions, tigers, bears, etc.) were >>
The period looks even worse at the end of a sentence.
<< lions, tigers, bears, etc! >> or << lions, tigers, bears, etc.! >>
I omit the period because it just looks right. But most spelling checkers mark "etc," as wrong as "etc.," as right.
The primary authority at my workplace is the Microsoft Manual of Style for Technical Publications, 3rd edition. I looked there but found no guidance.