corrected the display format to be used for commands

Signed-off-by: Mukul Sharma (Nokia) <mukul.sharma@nokia.com>

test/testdata/README.md

@@ -13,46 +13,96 @@ and then you replace the old `test/testdata/test_blob_cert.pem` with the new cer
 If the test/testdata/test_attach_leafcert.pem or test_attach_rootcert.pem or test_attach_certchain.pem expires than you can generate a new certificate and certificate using the given steps
 
 1. Generate a private key for Root certificate
-   openssl genrsa -des3 -out rootCA.key 2048
+
+```shell
+$ openssl genrsa -des3 -out rootCA.key 2048
+```
 2. Generate Root certificate
-   openssl req -x509 -new -nodes -key rootCA.key -sha256 -days 1825 -out rootCA.crt
+
+```shell
+$ openssl req -x509 -new -nodes -key rootCA.key -sha256 -days 1825 -out rootCA.crt
+```
    in Certificate generation set following values
    C = IN, ST = DEL, L = DEL, O = example.com, OU = sigstore, CN = sigstore, emailAddress = foo@example.com
+
 3. Generate Private key for Intermediate certificate
-   openssl genrsa -out intermediateCA.key 2048
+
+```shell
+$ openssl genrsa -out intermediateCA.key 2048
+```
 4. Generate CSR for Intermediate certificate
-   openssl req -new -key intermediateCA.key -out intermediateCA.csr
+
+```shell
+$ openssl req -new -key intermediateCA.key -out intermediateCA.csr
+```
    in Certificate generation set following values
    C = IN, ST = DEL, L = DEL, O = example.com, OU = sigstore-sub, CN = sigstore-sub, emailAddress = foo@example.com
+
 5. Create intermediate certificate config file by name "intermediateConfigFile" having content
    	subjectKeyIdentifier = hash
    	authorityKeyIdentifier = keyid:always,issuer
    	basicConstraints = critical, CA:true, pathlen:0
    	keyUsage = critical, digitalSignature, cRLSign, keyCertSign
+
 6. Create intermediate certificate
-   openssl x509 -req -in intermediateCA.csr -CA rootCA.crt -CAkey rootCA.key  -CAcreateserial -CAserial intermediateca.srl -out intermediateCA.crt -days 1825 -sha256 -extfile intermediateConfigFile
+
+```shell
+$ openssl x509 -req -in intermediateCA.csr -CA rootCA.crt -CAkey rootCA.key  -CAcreateserial -CAserial intermediateca.srl -out intermediateCA.crt -days 1825 -sha256 -extfile intermediateConfigFile
+```
+
 7. Create Private key for leaf certificate
-   openssl genrsa -out leafCA.key 2048
+
+```shell
+$ openssl genrsa -out leafCA.key 2048
+```
+
 8. Create CSR for Leaf certificate
-   openssl req -new -key leafCA.key -out leafCA.csr
+
+```shell
+$ openssl req -new -key leafCA.key -out leafCA.csr
+```
    in certificate generation set following values
    C = IN, ST = DEL, L = DEL, O = example.com, OU = sigstore-leaf, CN = sigstore-leaf, emailAddress = foo@example.com
+
 9. Create Leaf certificate config file by name "leafConfigFile" having content
         authorityKeyIdentifier=keyid,issuer
         basicConstraints=CA:FALSE
         keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
         extendedKeyUsage=codeSigning
         subjectAltName=email:copy
-10.Create Leaf certificate
-   openssl x509 -req -in leafCA.csr -CA intermediateCA.crt -CAkey intermediateCA.key  -CAcreateserial -CAserial leafca.srl -out leafCA.crt -days 1825 -sha256 -extfile leafConfigFile
+
+10. Create Leaf certificate
+
+```shell
+$ openssl x509 -req -in leafCA.csr -CA intermediateCA.crt -CAkey intermediateCA.key  -CAcreateserial -CAserial leafca.srl -out leafCA.crt -days 1825 -sha256 -extfile leafConfigFile
+```
+
 11. Generate Certificate chain by concatinating Intermediate certificate and Root certificate
-    cat intermediateCA.crt rootCA.crt > certChain.crt
+
+```shell
+$ cat intermediateCA.crt rootCA.crt > certChain.crt
+```
+
 12. copy private key of Leaf certificate to test/testdata/test_attach_private.key
-    cp leafCA.key test/testdata/test_attach_private.key
+
+```shell
+$ cp leafCA.key test/testdata/test_attach_private.key
+```
+
 13. copy root certificate to test/testdata/test_attach_rootcert.pem
-    cp rootCA.crt test/testdata/test_attach_rootcert.pem
+
+```shell
+$ cp rootCA.crt test/testdata/test_attach_rootcert.pem
+```
+
 14. copy cert chain to test/testdata/test_attach_certchain.pem
-    cp certChain.crt test/testdata/test_attach_certchain.pem
+
+```shell
+$ cp certChain.crt test/testdata/test_attach_certchain.pem
+```
+
 15. copy Leaf certificate to test/testdata/test_attach_leafcert.pem
-    cp leafCA.crt test/testdata/test_attach_leafcert.pem
 
+```shell
+$ cp leafCA.crt test/testdata/test_attach_leafcert.pem
+```