fix 2

Author: ThorneANN

flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/main/java/org/apache/flink/cdc/connectors/mysql/source/config/MySqlSourceConfigFactory.java

@@ -508,7 +508,7 @@ private static String convertToDebeziumStyle(String tables) {
         LOG.debug("After replacing comma with pipe separator: {}", tables);
 
         // Step 2: Replace escaped dot \. with placeholder
-        // In Flink CDC, \. means any character in regex, in Debezium it should be .
+        // In Flink CDC, \. means a literal dot in regex, in Debezium it should be . (any character).
         String unescapedTables = tables.replace("\\.", "$");
         LOG.debug("After unescaping dots as RegEx meta-character: {}", unescapedTables);
 

flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/test/resources/ddl/binlog_test.sql

@@ -25,8 +25,8 @@
 -- 4. Non-matching tables are not captured
 --
 -- IMPORTANT: This SQL file defines the initial schema for reference and documentation.
--- The actual test creates tables dynamically during execution to validate binlog-only capture.
--- The initial_table is crea1ted in @BeforeEach to ensure binlog is active before CDC source starts.
+-- The actual test created tables dynamically during execution to validate binlog-only capture.
+-- The initial_table is created in @BeforeEach to ensure binlog is active before CDC source starts.
 
 -- Initial table to activate binlog
 -- This table is actually created in test code, but defined here for reference