Address general comment

Address the comments in the general review comment on #1026:

- I did continue to use the *logical_pattern* production. We use that term in the text, and it's a good shorthand so readers don't need to snake through the grammar of *disjunctive_pattern*, *conjunctive_pattern* and *negated_pattern*.

- I haven't addressed or created issues for the open questions in the proposal yet.

Author: BillWagner

standard/patterns.md

@@ -21,16 +21,24 @@ A pattern may have one of the following forms:
 
 ```ANTLR
 pattern
-    : '(' pattern ')'
+    : logical_pattern
+    ;
+
+primary_pattern
+    : parenthesized_pattern
     | declaration_pattern
     | constant_pattern
     | var_pattern
     | positional_pattern
     | property_pattern
     | discard_pattern
+    | parenthesized_pattern
     | type_pattern
     | relational_pattern
-    | logical_pattern
+    ;
+
+parenthesized_pattern
+    : '(' pattern ')'
     ;
 ```
 
@@ -430,10 +438,10 @@ A *relational_pattern* is used to relationally test the pattern input value ([§
 
 ```ANTLR
 relational_pattern
-    : '<'  constant_expression
-    | '<=' constant_expression
-    | '>'  constant_expression
-    | '>=' constant_expression
+    : '<'  relational_expression
+    | '<=' relational_expression
+    | '>'  relational_expression
+    | '>=' relational_expression
     ;
 ```
 
@@ -491,7 +499,7 @@ conjunctive_pattern
 
 negated_pattern
     : 'not' negated_pattern
-    | pattern
+    | primary_pattern
     ;
 ```