Small Std documentation fixes

Added ` on several places since that causes italic texts because of markdown.

std/Std.hx

@@ -29,7 +29,7 @@
 extern class Std {
 
 	/**
-		Tells if a value v is of the type t. Returns false if v or t are null.
+		Tells if a value `v` is of the type `t`. Returns `false` if `v` or `t` are null.
 	**/
 	public static function is( v : Dynamic, t : Dynamic ) : Bool;
 
@@ -44,7 +44,7 @@ extern class Std {
 		returned. Otherwise null is returned.
 
 		This method is not guaranteed to work with interfaces or core types such
-		as String, Array and Date.
+		as `String`, `Array` and `Date`.
 
 		If `value` is null, the result is null. If `c` is null, the result is
 		unspecified.
@@ -74,7 +74,7 @@ extern class Std {
 	/**
 		Converts a `Float` to an `Int`, rounded towards 0.
 
-		If `x` is outside of the signed Int32 range, or is NaN, NEGATIVE_INFINITY or POSITIVE_INFINITY, the result is unspecified.
+		If `x` is outside of the signed Int32 range, or is `NaN`, `NEGATIVE_INFINITY` or `POSITIVE_INFINITY`, the result is unspecified.
 	**/
 	public static function int( x : Float ) : Int;
 
@@ -96,7 +96,7 @@ extern class Std {
 		Leading 0s that are not part of the 0x/0X hexadecimal notation are ignored, which means octal
 		notation is not supported.
 
-		If the input cannot be recognized, the result is null.
+		If the input cannot be recognized, the result is `null`.
 	**/
 	public static function parseInt( x : String ) : Null<Int>;
 
@@ -104,7 +104,7 @@ extern class Std {
 		Converts a `String` to a `Float`.
 
 		The parsing rules for `parseInt` apply here as well, with the exception of invalid input
-		resulting in a NaN value instead of null.
+		resulting in a `NaN` value instead of null.
 
 		Additionally, decimal notation may contain a single `.` to denote the start of the fractions.
 	**/