docs: expand on operator documentaion

Include more specific details around logical operators.

doc: update link with proper syntax

doc: remove ambiguous language from operators doc

doc: remove link to source code file

doc: cleaning up some language, and removing some mistakes in understanding

doc: revert example to prior state

doc: fix spacing

doc: Update doc/syntax/operators.rdoc

align example with typical format

Co-authored-by: Nobuyoshi Nakada <nobu@ruby-lang.org>

doc: Update doc/syntax/operators.rdoc

align format of other examples with rest of documentation

Co-authored-by: Nobuyoshi Nakada <nobu@ruby-lang.org>

Update doc/syntax/operators.rdoc

align format of other examples with rest of documentation

Co-authored-by: Nobuyoshi Nakada <nobu@ruby-lang.org>

doc: include `and` & `or` operators

doc(operators): remove accute language