Remove unneeded indent of code

Author: zoffixznet

doc/Language/terms.pod6

@@ -231,12 +231,12 @@ an L<identifier|/language/syntax#Identifiers> with an I<optional> sigil.
 Constants are L«C<our> scoped|/language/variables#The_our_Declarator»
 by default.
 
-=begin code
+    =begin code
         constant foo  = 42;
     my  constant $baz = rand;
     our constant @foo = 1, 2, 3;
         constant %bar = %(:42foo, :100bar);
-=end code
+    =end code
 
 I<NOTE: if you're using the Rakudo compiler, you need version 2018.07
 or newer for type constraints and auto-coercion on constants to be available.