Fix <pre> areas in markdown

README.md

@@ -77,7 +77,8 @@ can do:
   1. Build >=OpenSSL-1.1.0 (e.g., using the provided ./build_openssl command)
   2. Build and install luksrku: make && sudo make install
   3. Generate the keyfiles. For this we use the provided gen_config script:
-     ```
+
+    ```bash
     Disk UUID : 952ebed9-5256-4b4c-9de5-7f8829b4a74a
     Disk name : crypt-root
     Suggestion: TDFV6Z6XyDQ52ASswVFSEl8mrVfnH9F5b
@@ -92,19 +93,22 @@ can do:
     # Host UUID                             Host PSK                                                            Disk UUIDs
     d66f96fc-7056-46e1-aea6-0f3d705cd3bc    d94f3fc6c3507123bda4034dd8c865a1b4cf9870bda50e9ed9f861621d581017    952ebed9-5256-4b4c-9de5-7f8829b4a74a=54444656365a3658794451353241537377564653456c386d7256666e4839463562
     ```
+
      We follow the suggested passphrase, which should contain 192 bits of entropy.
   4. We use cryptsetup luksAddKey to add the suggested passphrase to the LUKS
      keyring of the server.
   5. The config script has given suggestions for server.txt and client.txt. We
      copy the respective contents into the files.
   6. Then we create the server binary config:
-     ```
+
+    ```bash
     $ luksrku-config server server.txt server.bin
     Successfully read key file with 1 entries.
     $ luksrku-config client client.txt client.bin
     Successfully read key file with 1 entries.
     Passphrase to encrypt keyfile:
     ```
+
      Now we'll have a server.bin and password-protected client.bin.
   7. On the server machine (i.e., the one with the LUKS disk) we copy
      server.bin to /etc/luksrku-server.bin.
@@ -120,6 +124,7 @@ can do:
       will now broadcast UDP packets onto the network indicating its presence.
       These packets will be sent to UDP port 23170.
   12. On the client, start the client to unlock the server's key:
+
      ```
      $ luksrku --client-mode -k client.bin 
      Keyfile password: