- a.list.of.words
Both parenthesised lists of terms and quoted phrases are ok with
-probabilistic prefixes such as **to:**, **from:**, and **subject:**. In particular
+probabilistic prefixes such as **to:**, **from:**, and **subject:**.
+For prefixes supporting regex search, the parenthesised list should be
+quoted. In particular
::
- subject:(pizza free)
+ subject:"(pizza free)"
is equivalent to