add missing newline to some ci message (#50627)

* add missing newline to some ci message

* `\t` -> `    `

tools/check_file_diff_approvals.sh

@@ -182,20 +182,20 @@ for API_FILE in ${API_FILES[*]}; do
           echo_line="test_checkout_api_compatible.py will be executed for changed checkout_api_compatible.py.\n"
           run_tools_test test_checkout_api_compatible.py
       elif [ "${API_FILE}" == "python/paddle/distributed/fleet/__init__.py" ]; then
-	      echo_line="You must have (fuyinno4 (Recommend), raindrops2sea) approval for ${API_FILE} changes"
-	      check_approval 1 35824027 38231817
+          echo_line="You must have (fuyinno4 (Recommend), raindrops2sea) approval for ${API_FILE} changes.\n"
+          check_approval 1 35824027 38231817
       elif [ "${API_FILE}" == "python/paddle/distributed/__init__.py" ]; then
-	      echo_line="You must have (fuyinno4 (Recommend), raindrops2sea) approval for ${API_FILE} changes"
-	      check_approval 1 35824027 38231817
+          echo_line="You must have (fuyinno4 (Recommend), raindrops2sea) approval for ${API_FILE} changes.\n"
+          check_approval 1 35824027 38231817
       elif [ "${API_FILE}" == "python/paddle/distributed/fleet/launch.py" ]; then
-	      echo_line="You must have (fuyinno4 (Recommend), raindrops2sea) approval for ${API_FILE} changes"
-	      check_approval 1 35824027 38231817
+          echo_line="You must have (fuyinno4 (Recommend), raindrops2sea) approval for ${API_FILE} changes.\n"
+          check_approval 1 35824027 38231817
       elif [ "${API_FILE}" == "paddle/scripts/paddle_build.bat" ] || [ "${API_FILE}" == "tools/windows/run_unittests.sh" ]; then
-	      echo_line="You must have one RD (zhouwei25 (Recommend), wanghuancoder, luotao1) approval for ${API_FILE} changes, which manages the Paddle CI task on Windows.\n"
-	      check_approval 1 52485244 6836917 26922892
+          echo_line="You must have one RD (zhouwei25 (Recommend), wanghuancoder, luotao1) approval for ${API_FILE} changes, which manages the Paddle CI task on Windows.\n"
+          check_approval 1 52485244 6836917 26922892
       elif [ "${API_FILE}" == "tools/parallel_UT_rule.py" ]; then
-	      echo_line="You must have one RD (zhouwei25 (Recommend), wanghuancoder, luotao1) approval for ${API_FILE} changes, which manages the rule of running unittest with a same GPU. If the unittest failed due to Insufficient GPU memory or CUBLAS_STATUS_ALLOC_FAILED, you can remove it from ${API_FILE}.\n"
-	      check_approval 1 52485244 6836917 26922892
+          echo_line="You must have one RD (zhouwei25 (Recommend), wanghuancoder, luotao1) approval for ${API_FILE} changes, which manages the rule of running unittest with a same GPU. If the unittest failed due to Insufficient GPU memory or CUBLAS_STATUS_ALLOC_FAILED, you can remove it from ${API_FILE}.\n"
+          check_approval 1 52485244 6836917 26922892
       elif [ "${API_FILE}" == "python/paddle/fluid/parallel_executor.py" ]; then
           echo_line="You must have one RD (Xreki,luotao1,zhhsplendid) approval for ${API_FILE}, which manages the underlying code for PaddlePaddle.\n"
           check_approval 1 12538138 6836917 7913861
@@ -488,13 +488,13 @@ if [ "${RUNTYPE_FILE_CHANGED}" != "" ] && [ "${GIT_PR_ID}" != "" ]; then
     for CMAKELISTS_FILE in ${RUNTYPE_FILE_CHANGED};
     do
         RUNTYPE_ADD=`git diff -U0 upstream/$BRANCH ${PADDLE_ROOT}/${CMAKELISTS_FILE} |grep "^+" |grep -E "SERIAL|RUN_TYPE=EXCLUSIVE|RUN_TYPE=DIST|RUN_TYPE=NIGHTLY|RUN_TYPE=EXCLUSIVE:NIGHTLY|RUN_TYPE=DIST:NIGHTLY|PROPERTIES[[:space:]]+TIMEOUT" || true`
-	if [[ ${RUNTYPE_ADD} != "" ]];then
-	    RUNTYPE_ADD_LINES="${RUNTYPE_ADD_LINES}\n${CMAKELISTS_FILE}\n${RUNTYPE_ADD}\n"
-	fi
+    if [[ ${RUNTYPE_ADD} != "" ]];then
+        RUNTYPE_ADD_LINES="${RUNTYPE_ADD_LINES}\n${CMAKELISTS_FILE}\n${RUNTYPE_ADD}\n"
+    fi
     done
     if [[ ${RUNTYPE_ADD_LINES} != "" ]];then
         echo_line="You must have one QA (XieYunshen(Recommend) or chalsliu) approval for setting parameter RUN_TYPE as EXCLUSIVE, DIST, NIGHTLY, EXCLUSIVE:NIGHTLY or DISTNIGHTLY, or setting parameter SERIAL, or setting TIMEOUT properties.\nThe corresponding lines are as follows:\n${RUNTYPE_ADD_LINES}\nFor more information, please refer to:https://github.com/PaddlePaddle/Paddle/wiki/PaddlePaddle-Unit-test-specification"
-	check_approval 1 32428676 45041955
+    check_approval 1 32428676 45041955
     fi
 fi