Formatting fix: Markdown -> POD

Author: zoffixznet

doc/Language/operators.pod6

@@ -137,17 +137,17 @@ The lower-case version (X<s///>) substitutes in-place, while the
 upper-case version (X<S///>) leaves the original alone and returns
 the resultant string.
 
-Both operators work on `$_` variable. Since smartmatch operator aliases
-the left hand side to `$_`, you can use lowercase `s///` with it, but
-it's a mistake to use it with uppercase `S///`, because you can't
+Both operators work on C<$_> variable. Since smartmatch operator aliases
+the left hand side to C<$_>, you can use lowercase C<s///> with it, but
+it's a mistake to use it with uppercase C<S///>, because you can't
 retrieve the modified string. The correct way is to alias the given
-string by some other method, such as a `for` loop or, as is shown in the
-example above, with a `given` block (in this case, it's a postfix form
+string by some other method, such as a C<for> loop or, as is shown in the
+example above, with a C<given> block (in this case, it's a postfix form
 of it, without curly braces).
 
 Both operators can take the same adverbs as the
-L<.subst method|/routine/subst>, which go between the `s`/`S` and the opening
-`/`. Whitespace can be used liberally:
+L<.subst method|/routine/subst>, which go between the C<s>/C<S> and the opening
+C</>. Whitespace can be used liberally:
 
     my $str = 'match string';
     $str ~~ s:g/match/replacement/;