chore: fix more lint (#5700)

* chore: fix 918 violations of comma-dangle rule

* chore: fix 2 violations of comma-spacing

* chore: fix 13 violations of padded-blocks

* chore: fix 50 violations of block-spacing

* chore: fix one violation of semi-spacing

* chore: fix 4 violations of space-before-blocks

* chore: fix 38 violations of object-curly-spacing

* chore: fix 30 violations of key-spacing

* chore: fix 3 violations of quote-props

* chore: fix 5 violations of arrow-parens

* chore: fix 8 violations of no-tabs

* chore: allow uncommented helper functions in mocha tests

* chore: fix several more lint errors

* chore: tweak eslint configuration in core and tests

* chore: rebuild for tests

tests/mocha/insertion_marker_test.js

@@ -18,7 +18,7 @@ suite('InsertionMarkers', function() {
         "type": "stack_block",
         "message0": "",
         "previousStatement": null,
-        "nextStatement": null
+        "nextStatement": null,
       },
       {
         "type": "row_block",
@@ -26,10 +26,10 @@ suite('InsertionMarkers', function() {
         "args0": [
           {
             "type": "input_value",
-            "name": "INPUT"
-          }
+            "name": "INPUT",
+          },
         ],
-        "output": null
+        "output": null,
       },
       {
         "type": "statement_block",
@@ -37,11 +37,11 @@ suite('InsertionMarkers', function() {
         "args0": [
           {
             "type": "input_statement",
-            "name": "STATEMENT"
-          }
+            "name": "STATEMENT",
+          },
         ],
         "previousStatement": null,
-        "nextStatement": null
+        "nextStatement": null,
       }]);
   });
   teardown(function() {