Update RatStr.pod6

Author: MasterDuke17

doc/Type/RatStr.pod6

@@ -7,7 +7,7 @@
     class RatStr is Rat is Str {}
 
 The dual value types (often referred to as L<allomorphs|/language/glossary#Allomorph>)
-allow for the representation of a value as both a string and a numeric type, typically
+allow for the representation of a value as both a string and a numeric type. Typically
 they will be created for you when the context is "stringy" but they can be determined
 to be numbers, such as in some L<quoting constructs|/language/quoting>:
 
@@ -119,4 +119,4 @@ coerce to the C<Rat> or C<Str> values first:
 
 =end pod
 
-# vim: expandtab softtabstop=4 shiftwidth=4 ft=perl6
+# vim: expandtab softtabstop=4 shiftwidth=4 ft=perl6