Reformat ScyllaDB/Cassandra docs

Author: dhui

README.md

@@ -28,12 +28,11 @@ Database drivers run migrations. [Add a new database?](database/driver.go)
 * [PGX v5](database/pgx/v5)
 * [Redshift](database/redshift)
 * [Ql](database/ql)
-* [Cassandra](database/cassandra)
-* [ScyllaDB](database/cassandra)
+* [Cassandra / ScyllaDB](database/cassandra)
 * [SQLite](database/sqlite)
 * [SQLite3](database/sqlite3) ([todo #165](https://github.com/mattes/migrate/issues/165))
 * [SQLCipher](database/sqlcipher)
-* [MySQL/ MariaDB](database/mysql)
+* [MySQL / MariaDB](database/mysql)
 * [Neo4j](database/neo4j)
 * [MongoDB](database/mongodb)
 * [CrateDB](database/crate) ([todo #170](https://github.com/mattes/migrate/issues/170))

database/cassandra/README.md

@@ -1,12 +1,16 @@
 # Cassandra / ScyllaDB
 
-* Drop command will not work on Cassandra 2.X because it rely on
-system_schema table which comes with 3.X. Works for ScyllaDB.
-* Other commands should work properly but are **not tested**
+* `Drop()` method will not work on Cassandra 2.X because it rely on
+system_schema table which comes with 3.X
+* Other methods should work properly but are **not tested**
 * The Cassandra driver (gocql) does not natively support executing multiple statements in a single query. To allow for multiple statements in a single migration, you can use the `x-multi-statement` param. There are two important caveats:
   * This mode splits the migration text into separately-executed statements by a semi-colon `;`. Thus `x-multi-statement` cannot be used when a statement in the migration contains a string with a semi-colon.
   * The queries are not executed in any sort of transaction/batch, meaning you are responsible for fixing partial migrations.
-* For ScyllaDB no additional configuration required as it is a drop-in replacement for Cassandra.
+
+**ScyllaDB**
+
+* No additional configuration is required since it is a drop-in replacement for Cassandra.
+* The `Drop()` method` works for ScyllaDB 5.1
 
 
 ## Usage