Eliminates reference to preview and reflow, refs #2687

Author: JJ

doc/Language/numerics.pod6

@@ -24,14 +24,16 @@ type, would produce a fractional number, without any rounding performed.
 say 4/5; # OUTPUT: «0.8␤»
 =end code
 
-The type produced by this division is either a L<Rat|/type/Rat> or a L<Num|/type/Num> type. The
-L<Rat|/type/Rat> is produced if, after reduction, the fraction's denominator is smaller
-than 64 bits, otherwise a L<Num|/type/Num> type is produced.
+The type produced by this division is either a L<Rat|/type/Rat> or a
+L<Num|/type/Num> type. The L<Rat|/type/Rat> is produced if, after reduction, the
+fraction's denominator is smaller than 64 bits, otherwise a L<Num|/type/Num>
+type is produced.
 
-The L<div|/routine/div> and L<narrow|/routine/narrow> routines can be helpful if you wish to end
-up with an L<Int|/type/Int> result, whenever possible. The L<div|/routine/div> operator performs
-integer division, discarding the remainder, while L<narrow|/routine/narrow> fits the number
-into the narrowest type it'll fit:
+The L<div|/routine/div> and L<narrow|/routine/narrow> routines can be helpful if
+you wish to end up with an L<Int|/type/Int> result, whenever possible. The
+L<div|/routine/div> operator performs integer division, discarding the
+remainder, while L<narrow|/routine/narrow> fits the number into the narrowest
+type it'll fit:
 
 =begin code
 say 5 div 2; # OUTPUT: «2␤»
@@ -633,9 +635,8 @@ my int $a-native = -42;
 Since there are no classes behind native types, there are no type objects you'd
 normally get with variables that haven't been initialized. Thus, native types
 are automatically initialized to zero. In 6.c language, native floating point
-types (C<num>, C<num32>, and C<num64>) are initialized to value C<NaN>; in 6.d
-language the default is C<0e0> (early implementation available in Rakudo
-2018.08, under C<use v6.d.PREVIEW> pragma).
+types (C<num>, C<num32>, and C<num64>) were initialized to value C<NaN>; in 6.d
+language the default is C<0e0>.
 
 =head2 Native dispatch
 

doc/Type/Sub.pod6

@@ -22,7 +22,7 @@ them. Use the C<&>-sigil to call them.
 
 X<|my (Sub)>X<|our (Sub)>
 Subs can be nested and scoped with C<my> and C<our>, whereby C<my> is the
-default. A sub declared with C<my> can not be reached from any outer scope. An
+default. A sub declared with C<my> cannot be reached from any outer scope. An
 C<our> scoped sub will not redefine a sub of the same name in the outer scope.
 Any sub can be accessed via a closure from any outer scope. For instance, in
 this example