Merge pull request #15687 from Marcofann/fix/typos

Fix typographical errors

Author: nikola-matic

docs/assembly.rst

@@ -209,7 +209,7 @@ Local Solidity variables are available for assignments, for example:
     ``assembly { signextend(<num_bytes_of_x_minus_one>, x) }``
 
 
-Since Solidity 0.6.0, the name of a inline assembly variable may not
+Since Solidity 0.6.0, the name of an inline assembly variable may not
 shadow any declaration visible in the scope of the inline assembly block
 (including variable, contract and function declarations).
 

test/libsolidity/syntaxTests/bytecodeReferences/circular_reference_internal_function.sol

@@ -1,6 +1,6 @@
 contract C
 {
-	// Internal uncalled function should not cause an cyclic dep. error
+	// Internal uncalled function should not cause a cyclic dep. error
 	function foo() internal { new D(); }
 	function callFoo() virtual public { foo(); }
 }