De-dups compunit and increment, refs #1912

Author: JJ

doc/Language/modules.pod6

@@ -49,14 +49,15 @@ directory for executable programs and scripts.
 Source files generally use the C<.pm6> extension, and scripts or
 executables use the C<.p6>. Test files use the C<.t> extension. Files which contain documentation use the C<.pod6> extension.
 
+X<|compunit>
 =head2 Loading and Basic Importing
 
 Loading a module makes the packages in the same namespace declared
 within available in the file scope of the loader. Importing from a
 module makes the symbols exported available in the lexical scope of
 the importing statement.
 
-=head3 X<need|compunit>
+=head3 C<need>X<|need>
 
 C<need> loads a C<compunit> at compile time.
 
@@ -76,7 +77,7 @@ C<MyModule::Class> will be defined when C<MyModule> is loaded.
 
 =comment class Class { ... } won't get exported automatically on loading...not sure if bug or..
 
-=head3 X<use|compunit>
+=head3 C<use> X<|use>
 
 C<use> loads and then imports from a compunit at compile time. It will look for
 files that end in C<.pm6> (C<.pm> is also supported). See
@@ -95,7 +96,7 @@ import MyModule;
 
 See also L<Selective Importing|/language/modules#Exporting_and_Selective_Importing> to restrict what you import.
 
-=head3 X<require|compunit>
+=head3 C<require>X<|require>
 
 C<require> loads a compunit and imports definite symbols at runtime.
 

doc/Language/operators.pod6

@@ -760,7 +760,7 @@ class or role, even after it has been redefined in the child class.
 
     multi sub prefix:<++>($x is rw) is assoc<non>
 
-Increments its argument by one and returns the updated value.X<|increment operator>
+Increments its argument by one and returns the updated value.X<|prefix increment operator>
 
     my $x = 3;
     say ++$x;   # OUTPUT: «4␤»
@@ -789,7 +789,7 @@ semantics.
 
     multi sub postfix:<++>($x is rw) is assoc<non>
 
-Increments its argument by one and returns the original value.X<|increment operator>
+Increments its argument by one and returns the original value.X<|postfix increment operator>
 
     my $x = 3;
     say $x++;   # OUTPUT: «3␤»