[fix] Trim branch name when deleting branch

Author: xiaochen-zhou

paimon-core/src/main/java/org/apache/paimon/table/AbstractFileStoreTable.java

@@ -656,7 +656,6 @@ public void createBranch(String branchName, String tagName) {
 
     @Override
     public void deleteBranch(String branchName) {
-        branchName = branchName.trim();
         String fallbackBranch =
                 coreOptions().toConfiguration().get(CoreOptions.SCAN_FALLBACK_BRANCH);
         if (!StringUtils.isNullOrWhitespaceOnly(fallbackBranch)

paimon-core/src/main/java/org/apache/paimon/table/Table.java

@@ -171,8 +171,10 @@ default void deleteTags(String tagStr) {
 
     /** Delete branches, branches are separated by commas. */
     @Experimental
-    default void deleteBranches(String branchNames) {
-        for (String branch : branchNames.split(",")) {
+    default void deleteBranches(String branchNamesStr) {
+        String[] branchNames =
+                Arrays.stream(branchNamesStr.split(",")).map(String::trim).toArray(String[]::new);
+        for (String branch : branchNames) {
             deleteBranch(branch);
         }
     }

paimon-core/src/main/java/org/apache/paimon/utils/BranchManager.java

@@ -50,7 +50,7 @@ default boolean branchExists(String branchName) {
     static String branchPath(Path tablePath, String branch) {
         return isMainBranch(branch)
                 ? tablePath.toString()
-                : tablePath.toString() + "/branch/" + BRANCH_PREFIX + branch.trim();
+                : tablePath.toString() + "/branch/" + BRANCH_PREFIX + branch;
     }
 
     static String normalizeBranch(String branch) {