Fix typo and clarify a sentence

Author: kjkuan

doc/Language/unicode.pod6

@@ -17,7 +17,7 @@ X<|Normalization>
 =head2 Normalization
 
 Perl 6 applies normalization by default to all input and output except for file
-names which are stored as L<C<UTF8-C8>|#UTF8-C8>; graphemes, which are
+names, which are read and written as L<C<UTF8-C8>|#UTF8-C8>; graphemes, which are
 user-visible forms of the characters, will use a normalized representation. What
 does this mean? For example, the grapheme C<á> can be represented in two ways,
 either using one codepoint:
@@ -86,9 +86,10 @@ encoding:
       .close;
     }
 
-    say slurp($test-file, enc => 'utf8-c8'); # OUTPUT: «(65 250 66 251 252 67 253)»
+    say slurp($test-file, enc => 'utf8-c8');
+    # OUTPUT: «(65 250 66 251 252 67 253)»
 
-Reading with this type of encoding and encoding them back to UTF8-C8 will give you back the original bytes; this would not have been possible with the default UTF8-C8.
+Reading with this type of encoding and encoding them back to UTF8-C8 will give you back the original bytes; this would not have been possible with the default UTF-8 encoding.
 
 Please note that this encoding so far is not supported in the JVM implementation of Rakudo.