removed example with multiline multielement tuple, since it different in different variants

  and more text cleanup

Author: rssh

content/NNN-one-element-tuple-syntax.md

@@ -67,8 +67,6 @@ There is also no concise syntax for empty tuple types - `EmptyTuple` must be wri
 val empty: EmptyTuple = EmptyTuple  // No shorthand syntax available
 ```
 
-Scala supports trailing commas in multi-line contexts (parameters, arguments, imports, tuples, etc.) when the closing delimiter is on its own line (SIP-27). However, there is no way to use a trailing comma to disambiguate single-element tuples from parenthesized expressions, since `(a,)` is a syntax error.
-
 ## Proposed Solution
 
 ### High-Level Overview