[PPML] Refine readthedoc lines and space (#6509)

* Remove empty lines
* Use same space for indent
* Add empty line at the end

docs/readthedocs/source/doc/PPML/Overview/azure_ppml.md

@@ -343,7 +343,6 @@ bash bigdl-ppml-submit.sh \
     --verbose \
     $SPARK_EXTRA_JAR_PATH \
     $ARGS
-
 ```
 
 ## 4. Run TPC-H example
@@ -375,7 +374,8 @@ will generate roughly 10GB of input data.
 Generate primary key and data key, then save to file system.
 
 The example code for generating the primary key and data key is like below:
-```
+
+```bash
 BIGDL_VERSION=2.1.0
 java -cp '/ppml/trusted-big-data-ml/work/bigdl-$BIGDL_VERSION/jars/*:/ppml/trusted-big-data-ml/work/spark-3.1.2/conf/:/ppml/trusted-big-data-ml/work/spark-3.1.2/jars/* \
     -Xmx10g \
@@ -390,7 +390,8 @@ java -cp '/ppml/trusted-big-data-ml/work/bigdl-$BIGDL_VERSION/jars/*:/ppml/trust
 Encrypt data with specified BigDL `AzureKeyManagementService`
 
 The example code of encrypting data is like below:
-```
+
+```bash
 BIGDL_VERSION=2.1.0
 java -cp '/ppml/trusted-big-data-ml/work/bigdl-$BIGDL_VERSION/jars/*:/ppml/trusted-big-data-ml/work/spark-3.1.2/conf/:/ppml/trusted-big-data-ml/work/spark-3.1.2/jars/* \
     -Xmx10g \
@@ -417,7 +418,7 @@ location of the input data and where the output should be saved.
 
 The example script to run a query is like:
 
-```
+```bash
 export RUNTIME_DRIVER_MEMORY=8g
 export RUNTIME_DRIVER_PORT=54321
 
@@ -472,11 +473,3 @@ bash bigdl-ppml-submit.sh \
 INPUT_DIR is the TPC-H's data dir.
 OUTPUT_DIR is the dir to write the query result.
 The optional parameter [QUERY] is the number of the query to run e.g 1, 2, ..., 22
-
-
-
-
-
-
-
-

docs/readthedocs/source/doc/PPML/QuickStart/deploy_ppml_in_production.md

@@ -23,6 +23,7 @@ You can find more details in [Intel SGX Developer Guide](https://download.01.org
 
 ```eval_rst
 .. mermaid::
+
    graph LR
       subgraph SGX enclave
       MRENCLAVE(fa:fa-file-signature MRENCLAVE)