Fixes errors

Basically changes say to put, which always calls Str (while say calls
.gist). Closes #2546

doc/Language/contexts.pod6

@@ -44,7 +44,13 @@ foo
 
 =head1 Number X<|number context>
 
-This context, and probably all of them except sink above, are I<conversion> or I<interpretation> contexts in the sense that they take an untyped or typed variable and duck-type it to whatever is needed to perform the operation. In some cases that will imply a conversion (from L<Str|/type/Str> to L<Numeric|/type/Numeric>, for instance); in other cases simply an interpretation (L<IntStr|/type/IntStr> will be interpreted as L<Int|/type/Int> or as L<Str|/type/Str>).
+This context, and probably all of them except sink above, are I<conversion> or
+I<interpretation> contexts in the sense that they take an untyped or typed
+variable and duck-type it to whatever is needed to perform the operation. In
+some cases that will imply a conversion (from L<Str|/type/Str> to
+L<Numeric|/type/Numeric>, for instance); in other cases simply an interpretation
+(L<IntStr|/type/IntStr> will be interpreted as L<Int|/type/Int> or as
+L<Str|/type/Str>).
 
 I<Number context> is called whenever we need to apply a numerical operation on a
 variable.
@@ -56,7 +62,7 @@ say $not-a-string+$neither-a-string; # OUTPUT: «4␤»
 =end code
 
 In the code above, strings will be interpreted in numeric context as long as
-there is only some numbers and no other characters. It can have any number of
+there are only a few digits and no other characters. It can have any number of
 leading or trailing whitespace, however.
 
 Numeric context can be forced by using arithmetic operators such as C<+> or
@@ -84,16 +90,16 @@ used, for instance, for coercing non-string values so that they can be printed
 to standard output.
 
 =for code :preamble<my $very-complicated-and-hairy-object>
-    say $very-complicated-and-hairy-object; # OUTPUT: something meaningful
+put $very-complicated-and-hairy-object; # OUTPUT: something meaningful
 
 Or when smartmatching to a regular expression:
 
-    say 333444777 ~~ /(3+)/; # OUTPUT: «｢333｣␤ 0 => ｢333｣␤»
+    put 333444777 ~~ /(3+)/; # OUTPUT: «｢333｣␤ 0 => ｢333｣␤»
 
 In general, the L<C<Str> routine|/routine/Str> will be called on a variable to
-contextualize it; since this method is inherited from L<Mu|/type/Mu>, it is always
-present, but it is not always guaranteed to work. In some core classes it will
-issue a warning.
+contextualize it; since this method is inherited from L<Mu|/type/Mu>, it is
+always present, but it is not always guaranteed to work. In some core classes it
+will issue a warning.
 
 L<C<~>|/routine/~> is the (unary) string contextualizer. As an operator, it
 concatenates strings, but as a prefix operator it becomes the string context
@@ -116,7 +122,7 @@ string:
     say [~] [] ; # OUTPUT: «␤»
 
 Since L<C<~> acts also as buffer concatenation operator|/routine/~#(Operators)_infix_~>,
-using it will
+it will
 have to check that every element is not empty, since a single empty buffer in
 string context will behave as a string, thus yielding an error.
 
@@ -130,8 +136,7 @@ my $non-empty = Buf.new(0x3, 0x33);
 my $empty = [];
 my $non-empty-also = Buf.new(0x2,0x22);
 say [~] $non-empty, $empty, $non-empty-also;
-# OUTPUT: «(exit code 1) Cannot use a Buf as a string, but you called the Stringy method on it
-# in block <unit> at /tmp/bO_heb6AS9 line 1␤␤»
+# OUTPUT: «Cannot use a Buf as a string, but you called the Stringy method on it
 =end code
 
 Since C<~> is putting in string context the second element of this list,
@@ -140,22 +145,23 @@ using the second form that applies to strings, thus yielding the shown error.
 Simply making sure that everything you concatenate is a buffer will avoid this
 problem.
 
-    my $non-empty = Buf.new(0x3, 0x33);
-    my $empty = Buf.new();
-    my $non-empty-also = Buf.new(0x2,0x22);
-    say [~] $non-empty, $empty, $non-empty-also; # OUTPUT: «Buf:0x<03 33 02 22>␤»
+=for code
+my $non-empty = Buf.new(0x3, 0x33);
+my $empty = Buf.new();
+my $non-empty-also = Buf.new(0x2,0x22);
+say [~] $non-empty, $empty, $non-empty-also; # OUTPUT: «Buf:0x<03 33 02 22>␤»
 
 In general, a context will coerce a variable to a particular type by calling the
 contextualizer; in the case of mixins, if the context class is mixed in, it will
 behave in that way.
 
     my $described-number = 1i but 'Unity in complex plane';
-    say $described-number; # OUTPUT: «Unity in complex plane␤»
+    put $described-number; # OUTPUT: «Unity in complex plane␤»
 
 C<but> creates a mixin, which endows the complex number with a C<Str> method.
-C<say> puts into string context, that is, it calls C<Str>, the string
+C<put> contextualizes it into a string, that is, it calls C<Str>, the string
 contextualizer, with the result shown above.
 
 =end pod
 
-# vim: expandtab softtabstop=4 shiftwidth=4 ft=perl6
+# vim: expandtab softtabstop=4 shiftwidth=4 ft=perl6