Fixing arithmetics.

And some reflow. Closes #2204, which is absolutely correct. Thanks!

doc/Language/syntax.pod6

@@ -343,7 +343,7 @@ operator after them. For instance:
     sub term:<dice> { (1..6).pick };
     say dice + dice;
 
-can print any number between 1 and 12.
+can print any number between 2 and 12.
 
 If instead we had declared C<dice> as a regular
 
@@ -362,9 +362,9 @@ expression (and thus also a statement).
 
 The C<do> prefix turns statements into expressions. So while
 
-    =begin code :skip-test
-    my $x = if True { 42 };     # Syntax error!
-    =end code
+=begin code :skip-test
+my $x = if True { 42 };     # Syntax error!
+=end code
 
 is an error,
 
@@ -424,9 +424,9 @@ variables:
 
 =head2 Packages and qualified names
 
-Named entities, such as variables, constants, classes, modules or subs,
-are part of a namespace. Nested parts of a name use C<::> to separate
-the hierarchy. Some examples:
+Named entities, such as variables, constants, classes, modules or subs, are part
+of a namespace. Nested parts of a name use C<::> to separate the hierarchy. Some
+examples:
 
 =begin code :skip-test
 $foo                # simple identifiers