[Avodah] Parenthesis

[Rich, Joel via Avodah]

[See my plug of RJR's column in the previous post. His question about a
distraught new widow and negi'ah as well... And that's just the column's
*padding*!

Extra credit if you answer the question about parenthesis while "vayehi
binsoa'" and its upside-down nuns is still in parashas hashavua.
-micha]

1. In the Shulchan Aruch -- who is the author of the statements in
   parenthesis in the Rama like print that don't start with Hagah?
2. In Rashi (or Tosfot), who decided to put certain words in parenthesis
   and why? (e.g., differing manuscripts, logic, etc.)

Kt
Joel rich