fix docs

Co-authored-by: r0qs <rodrigo.saramago@protonmail.com>

docs/contracts/interfaces.rst

@@ -65,7 +65,7 @@ inheritance.
 Types defined inside interfaces and other contract-like structures
 can be accessed from other contracts: ``Token.TokenType`` or ``Token.Coin``.
 
-.. warning:
+.. warning::
 
     Interfaces have supported ``enum`` types since :doc:`Solidity version 0.5.0 <050-breaking-changes>`, make
     sure the pragma version specifies this version as a minimum.

docs/smtchecker.rst

@@ -636,7 +636,7 @@ expression type.
 It is also helpful to cast the called contract's variable as the type of the
 most derived type in case of inheritance.
 
-   .. code-block:: solidity
+.. code-block:: solidity
 
     // SPDX-License-Identifier: GPL-3.0
     pragma solidity >=0.8.0;
@@ -697,8 +697,9 @@ storage for ``address`` variables, therefore if ``B.a`` had type ``address``
 the encoding would assume that its storage does not change in between
 transactions to ``B``.
 
-   .. code-block:: solidity
+.. code-block:: solidity
 
+    // SPDX-License-Identifier: GPL-3.0
     pragma solidity >=0.8.0;
 
     contract A {

docs/units-and-global-variables.rst

@@ -380,7 +380,7 @@ The following properties are available for a contract type ``C``:
 In addition to the properties above, the following properties are available
 for an interface type ``I``:
 
-``type(I).interfaceId``:
+``type(I).interfaceId``
     A ``bytes4`` value containing the `EIP-165 <https://eips.ethereum.org/EIPS/eip-165>`_
     interface identifier of the given interface ``I``. This identifier is defined as the ``XOR`` of all
     function selectors defined within the interface itself - excluding all inherited functions.