Merge pull request #12689 from callezenwaka/develop

Fix typos on doc

Author: chriseth

docs/assembly.rst

@@ -139,7 +139,7 @@ the variable will not point beyond ``calldatasize()`` is performed.
 For external function pointers the address and the function selector can be
 accessed using ``x.address`` and ``x.selector``.
 The selector consists of four right-aligned bytes.
-Both values are can be assigned to. For example:
+Both values can be assigned to. For example:
 
 .. code-block:: solidity
     :force:

docs/contracts/using-for.rst

@@ -120,7 +120,7 @@ It is also possible to extend elementary types in that way:
     }
 
 Note that all external library calls are actual EVM function calls. This means that
-if you pass memory or value types, a copy will be performed, even of the
+if you pass memory or value types, a copy will be performed, even in case of the
 ``self`` variable. The only situation where no copy will be performed
 is when storage reference variables are used or when internal library
 functions are called.