Format code example for transform options (#459)

* Format code example for transform options

* Remove extra code, edit for flow and typos

Author: karlhorky

README.md

@@ -590,17 +590,23 @@ Built in transformation functions are:
 * For PascalCase - `postgres.toPascal` and `postgres.fromPascal`
 * For Kebab-Case - `postgres.toKebab` and `postgres.fromKebab`
 
-These functions can be passed in as options when calling `postgres()`. For example -
+These functions can be passed in as options when calling `postgres()`, for example:
 ```js
-// this will tranform the column names to camel case back and forth
-(async function () {
-  const sql = postgres('connectionURL', { transform: { column: { to: postgres.fromCamel, from: postgres.toCamel } }});
-  await sql`CREATE TABLE IF NOT EXISTS camel_case (a_test INTEGER, b_test TEXT)`;
-  await sql`INSERT INTO camel_case ${ sql([{ aTest: 1, bTest: 1 }]) }`
-  const data = await sql`SELECT ${ sql('aTest', 'bTest') } FROM camel_case`;
-  console.log(data) // [ { aTest: 1, bTest: '1' } ]
-  process.exit(1)
-})();
+// Transform the column names to and from camel case
+const sql = postgres('connectionURL', {
+  transform: {
+    column: {
+      to: postgres.fromCamel,
+      from: postgres.toCamel,
+    },
+  },
+})
+
+await sql`CREATE TABLE IF NOT EXISTS camel_case (a_test INTEGER, b_test TEXT)`
+await sql`INSERT INTO camel_case ${ sql([{ aTest: 1, bTest: 1 }]) }`
+const data = await sql`SELECT ${ sql('aTest', 'bTest') } FROM camel_case`
+
+console.log(data) // [ { aTest: 1, bTest: '1' } ]
 ```
 
 > Note that if a column name is originally registered as snake_case in the database then to tranform it from camelCase to snake_case when querying or inserting, the column camelCase name must be put in `sql('columnName')` as it's done in the above example, Postgres.js does not rewrite anything inside the static parts of the tagged templates.