Revised the code as suggested by PyCharm.

accounting/static/accounting/css/report.css

@@ -30,9 +30,6 @@
 .date-account-line {
     font-size: 0.833em;
 }
-.negative {
-    color: red;
-}
 .journal-credit {
     padding-left: 1em;
 }

accounting/static/accounting/js/regular-payments.js

@@ -24,7 +24,7 @@
 /**
  * Returns the regular payment data.
  *
- * @returns {{debits: [], credits: []}}
+ * @returns {{debit: [], credit: []}}
  */
 function getRegularPayments() {
     const today = new Date($("#txn-date").get(0).value);

accounting/static/accounting/js/summary-helper.js

@@ -142,7 +142,7 @@ function loadSummaryCategoryData() {
  */
 function startSummaryHelper(summary) {
     // Replaced common substitution character "*" with "×"
-    summary_content = summary.val();
+    let summary_content = summary.val();
     summary_content = summary_content.replace(/\*(\d+)$/, "×$1");
     const type = summary.data("type");
     const no = summary.data("no");
@@ -331,7 +331,7 @@ function switchSummaryTab(tab) {
 /**
  * Sets the known general category buttons.
  *
- * @param {string} category the general category
+ * @param {string|null} category the general category
  */
 function setSummaryGeneralCategoryButtons(category) {
     $(".btn-summary-general-category").each(function () {
@@ -480,7 +480,7 @@ function setSummaryRegularPaymentButtons(category) {
  *
  * @param {string} format the category format, either "general",
  *                        "travel", or "bus".
- * @param {string} category the category
+ * @param {string|null} category the category
  */
 function setSummaryAccount(format, category) {
     const recordId = $("#summary-record").get(0).value;

accounting/templatetags/accounting.py

@@ -43,7 +43,7 @@ def accounting_amount(value: Union[str, int]) -> str:
             break
         s = m.group(1) + "," + m.group(2)
     if value < 0:
-        s = "(%s)" % (s)
+        s = "(%s)" % s
     return s