refactor: - Make white-space between sort and group explanations same as for filters

The extra blank line makes the explanations readable with custom sorting and grouping,
where the continuation characters and/or placeholders are used.

Author: claremacrae

src/Query/Explain/Explainer.ts

@@ -61,15 +61,15 @@ export class Explainer {
             return this.indent('No grouping instructions supplied.\n');
         }
 
-        return query.grouping.map((group) => group.statement.explainStatement(this.indentation)).join('\n') + '\n';
+        return query.grouping.map((group) => group.statement.explainStatement(this.indentation)).join('\n\n') + '\n';
     }
 
     public explainSorters(query: Query) {
         if (query.sorting.length === 0) {
             return this.indent('No sorting instructions supplied.\n');
         }
 
-        return query.sorting.map((sort) => sort.statement.explainStatement(this.indentation)).join('\n') + '\n';
+        return query.sorting.map((sort) => sort.statement.explainStatement(this.indentation)).join('\n\n') + '\n';
     }
 
     public explainQueryLimits(query: Query) {

tests/Query/Explain/Explainer.test.ts

@@ -75,9 +75,11 @@ limit groups 3
                 description includes some
 
             group by priority reverse
+
             group by happens
 
             sort by description reverse
+
             sort by path
 
             At most 50 tasks.
@@ -104,9 +106,11 @@ limit groups 3
                   description includes some
 
               group by priority reverse
+
               group by happens
 
               sort by description reverse
+
               sort by path
 
               At most 50 tasks.
@@ -178,7 +182,9 @@ describe('explain groupers', () => {
         const query = new Query(source);
         expect(explainer.explainGroups(query)).toMatchInlineSnapshot(`
             "group by due
+
             group by status.name reverse
+
             group by function task.description.toUpperCase()
             "
         `);
@@ -227,6 +233,7 @@ describe('explain sorters', () => {
         const query = new Query(source);
         expect(explainer.explainSorters(query)).toMatchInlineSnapshot(`
             "sort by due
+
             sort by priority()
             "
         `);