Improving the page by (slight) rewriting

doc/Language/variables.pod6

@@ -1333,12 +1333,13 @@ used in the interpreter and the overall Perl 6 environment.
 X<|$*PERL>
 =head4 C<$*PERL>
 
-This object contains information on the current implementation of the Perl
+This object contains information on the current implementation of the Perl 6
 language:
 
     say $*PERL.compiler.version; # OUTPUT: «v2018.11.52.g.06156.a.7.ca␤»
 
-but it simply stringifies to the major version of the compiler:
+but it simply stringifies to the name of the language, followed by the major
+version of the compiler:
 
     say $*PERL;# OUTPUT: «Perl 6 (6.d)␤»
 
@@ -1391,17 +1392,15 @@ X<|$*USER>
 =head4 C<$*USER>
 
 An C<Allomorph> with information about the user that is running the program.
-It's an object that evaluates to C<username (uid)>.  It will evaluate to the
-username only if treated as a string and the numeric user id if treated as a
-number.
+It will evaluate to the username only if treated as a string and the numeric
+user id if treated as a number.
 
 X<|$*GROUP>
 =head4 C<$*GROUP>
 
 An C<Allomorph> with the primary group of the user who is running the program.
-It's an object that evaluates to C<groupname (gid)>.
-It will evaluate to the groupname only if treated as a
-string and the numeric group id if treated as a number.
+It will evaluate to the groupname only if treated as a string and the numeric
+group id if treated as a number.
 
 X<|$*HOME>
 =head4 C<$*HOME>
@@ -1429,13 +1428,14 @@ determined by L«C<.tmpdir IO::Spec::* method>|/routine/tmpdir».
 X<|$*TOLERANCE>
 =head4 C<$*TOLERANCE>
 
-Variable used by the C<=~=> operator, and any operations that depend on it, to
-decide if two values are approximately equal. Defaults to C<1e-15>;
+Variable used by the L<C<=~=>|/routine/=~=> operator, and any operations that
+depend on it, to decide if two values are approximately equal. Defaults to
+C<1e-15>.
 
 X<|$*THREAD>
 =head4 C<$*THREAD>
 
-Contains a L<Thread> object representing the currently executing thread;
+Contains a L<Thread> object representing the currently executing thread.
 
 X<|$*SCHEDULER>
 =head4 C<$*SCHEDULER>
@@ -1457,15 +1457,14 @@ This behavior is not tested in the spec tests and is subject to change.
 X<|$*SAMPLER>
 =head4 C<$*SAMPLER>
 
-The current L<Telemetry::Sampler> used for
-making snapshots of system state.  Only available if L<Telemetry> has been
-loaded.
+The current L<Telemetry::Sampler> used for making snapshots of system state.
+Only available if L<Telemetry> has been loaded.
 
 =head1 Naming conventions
 
 It is helpful to know our naming conventions in order to understand what codes
-do directly. However, there is not yet a conventions list covering anywhere.
-Still we list several conventions that are widely held.
+do directly. However, there is not yet (and might never be) an official list of;
+still, we list several conventions that are widely held.
 
 =item1 Subs and methods from the built-ins library try to have single-word names
 when a good one could be found. In cases where there are two or more words