solved 1 more task when source code processing

Author: EvilLord666

formatter.go

@@ -117,9 +117,14 @@ func Format(template string, args ...any) string {
 					strVal := getItemAsStr(&args[argNumber], &argFormatOptions)
 					formattedStr.WriteString(strVal)
 				} else {
-					formattedStr.WriteByte('{')
-					formattedStr.WriteString(argNumberStr)
-					formattedStr.WriteByte('}')
+					if argNumberStr != "" {
+						formattedStr.WriteByte('{')
+						formattedStr.WriteString(argNumberStr)
+						formattedStr.WriteByte('}')
+					} else {
+						// complicated case when we have brackets in line and open line at the end
+						formattedStr.WriteByte('{')
+					}
 				}
 				i = j
 			}
@@ -210,9 +215,14 @@ func FormatComplex(template string, args map[string]any) string {
 					strVal := getItemAsStr(&arg, &argFormatOptions)
 					formattedStr.WriteString(strVal)
 				} else {
-					formattedStr.WriteByte('{')
-					formattedStr.WriteString(argNumberStr)
-					formattedStr.WriteByte('}')
+					if argNumberStr != "" {
+						formattedStr.WriteByte('{')
+						formattedStr.WriteString(argNumberStr)
+						formattedStr.WriteByte('}')
+					} else {
+						// complicated case when we have brackets in line and open line at the end
+						formattedStr.WriteByte('{')
+					}
 				}
 				i = j
 			}

formatter_test.go

@@ -123,6 +123,12 @@ func TestFormat(t *testing.T) {
 			args:     []any{},
 			expected: "func afterHandle(respWriter *http.ResponseWriter, statusCode int, data interface{}) {",
 		},
+
+		"close bracket at the end of line of go line with {} inside": {
+			template: "func afterHandle(respWriter *http.ResponseWriter, statusCode int, data interface{}) }",
+			args:     []any{},
+			expected: "func afterHandle(respWriter *http.ResponseWriter, statusCode int, data interface{}) }",
+		},
 	} {
 		t.Run(name, func(t *testing.T) {
 			assert.Equal(t, test.expected, stringFormatter.Format(test.template, test.args...))
@@ -207,6 +213,17 @@ func TestFormatComplex(t *testing.T) {
 			args:     map[string]any{},
 			expected: "    \"server\": {",
 		},
+		"open bracket at the end of line of go line with {} inside": {
+			template: "func afterHandle(respWriter *http.ResponseWriter, statusCode int, data interface{}) {",
+			args:     map[string]any{},
+			expected: "func afterHandle(respWriter *http.ResponseWriter, statusCode int, data interface{}) {",
+		},
+
+		"close bracket at the end of line of go line with {} inside": {
+			template: "func afterHandle(respWriter *http.ResponseWriter, statusCode int, data interface{}) }",
+			args:     map[string]any{},
+			expected: "func afterHandle(respWriter *http.ResponseWriter, statusCode int, data interface{}) }",
+		},
 	} {
 		t.Run(name, func(t *testing.T) {
 			assert.Equal(t, test.expected, stringFormatter.FormatComplex(test.template, test.args))