take care of Hans' remarks

docs/docs/contracts.md

@@ -528,6 +528,9 @@ string`, `String.sha3(s)` and `Crypto.sha3(s)` will give different results on AE
 
 ### Authorization interface
 
+!!! attention
+    This feature is not part of the current protocol version and could be implemented in a future protocol upgrade. 
+
 When a Generalized account is authorized, the authorization function needs
 access to the transaction and the transaction hash for the wrapped transaction. (A `GAMetaTx`
 wrapping a transaction.) The transaction and the transaction hash is available in the primitive

docs/sophia_stdlib.md

@@ -14,7 +14,6 @@ The out-of-the-box namespaces are:
 
 - [Bits](#Bits)
 - [Bytes](#Bytes)
-- [Char](#Char)
 - [Int](#Int)
 - [Map](#Map)
 - [Address](#Address)
@@ -151,26 +150,6 @@ Bytes.split(a : bytes(m + n)) : bytes(m) * bytes(n)
 
 Splits a byte array at given index
 
-
-## Char
-
-#### to_int
- ```
-Char.to_int(c : char) : int
-```
-
-Returns the UTF-8 codepoint of a character
-
-
-#### from_int
-
-```
-Char.from_int(i : int) : option(char)
- ```
-
-Opposite of [to_int](#to_int). Returns `None` if the integer doesn't correspond to a single (normalized) codepoint.
-
-
 ## Int
 
 #### to_str