(DOCSP-18900): Clear up confusing time series example (#108)

Author: jeff-allen-mongo

source/core/timeseries-collections.txt

@@ -65,17 +65,14 @@ command:
 
 .. code-block:: javascript
 
-   db.createCollection("weather", { timeseries: { timeField: "timestamp" } } )
-
    db.createCollection(
-       "weather24h",
+       "weather",
        {
           timeseries: {
              timeField: "timestamp",
              metaField: "metadata",
              granularity: "hours"
-          },
-          expireAfterSeconds: 86400
+          }
        }
    )
 
@@ -139,57 +136,69 @@ Insert Measurements into a Time Series Collection
 Each document you insert should contain a single measurement. To insert
 multiple documents at once, issue the following command:
 
-.. code-block:: javescript
-
-   db.weather.insertMany([{
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-18T00:00:00.000Z"),
-      "temp": 12
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-18T04:00:00.000Z"),
-      "temp": 11
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-18T08:00:00.000Z"),
-      "temp": 11
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-18T12:00:00.000Z"),
-      "temp": 12
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-18T16:00:00.000Z"),
-      "temp": 16
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-18T20:00:00.000Z"),
-      "temp": 15
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-19T00:00:00.000Z"),
-      "temp": 13
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-19T04:00:00.000Z"),
-      "temp": 12
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-19T08:00:00.000Z"),
-      "temp": 11
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-19T12:00:00.000Z"),
-      "temp": 12
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-19T16:00:00.000Z"),
-      "temp": 17
-   }, {
-      "metadata": {"sensorId": 5578, "type": "temperature"},
-      "timestamp": ISODate("2021-05-19T20:00:00.000Z"),
-      "temp": 12
-   }])
+.. code-block:: javascript
+
+   db.weather.insertMany( [
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-18T00:00:00.000Z"),
+         "temp": 12
+      },
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-18T04:00:00.000Z"),
+         "temp": 11
+      },
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-18T08:00:00.000Z"),
+         "temp": 11
+      },
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-18T12:00:00.000Z"),
+         "temp": 12
+      },
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-18T16:00:00.000Z"),
+         "temp": 16
+      },
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-18T20:00:00.000Z"),
+         "temp": 15
+      }, {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-19T00:00:00.000Z"),
+         "temp": 13
+      },
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-19T04:00:00.000Z"),
+         "temp": 12
+      },
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-19T08:00:00.000Z"),
+         "temp": 11
+      },
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-19T12:00:00.000Z"),
+         "temp": 12
+      },
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-19T16:00:00.000Z"),
+         "temp": 17
+      },
+      {
+         "metadata": { "sensorId": 5578, "type": "temperature" },
+         "timestamp": ISODate("2021-05-19T20:00:00.000Z"),
+         "temp": 12
+      }
+   ] )
 
 To insert a single document, use the :method:`db.collection.insertOne()`
 method.
@@ -200,7 +209,7 @@ Query a Time Series Collection
 To retrieve one document from a time series collection, issue the
 following command:
 
-.. code-block:: javescript
+.. code-block:: javascript
 
    db.weather.findOne({
       "timestamp": ISODate("2021-05-18T00:00:00.000Z")
@@ -212,9 +221,9 @@ Run Aggregations on a Time Series Collection
 For additional query functionality, use the :ref:`aggregation framework
 <aggregation-framework>`:
 
-.. code-block:: javescript
+.. code-block:: javascript
 
-   db.weather.aggregate([
+   db.weather.aggregate( [
       {
          $project: {
             date: {
@@ -235,13 +244,13 @@ For additional query functionality, use the :ref:`aggregation framework
             avgTmp: { $avg: "$temp" }
          }
       }
-   ])
+   ] )
 
-The preceeding example groups all documents by the date of the
+The example aggregation pipeline groups all documents by the date of the
 measurement and then returns the average of all temperature measurements
 that day:
 
-.. code-block:: javescript
+.. code-block:: javascript
 
    {
     "_id" : {
@@ -278,7 +287,7 @@ To determine if a collection is of type time series, use the
 
 If the collection is a time series collection, it returns this:
 
-.. code-block:: javascript
+.. code-block:: none
 
   {
       cursor: {
@@ -337,7 +346,7 @@ collection was created. For example, to change the compression algorithm
 to ``snappy`` for a new ``weather`` collection, add the following
 option:
 
-.. code-block:: javescript
+.. code-block:: javascript
 
    db.createCollection(
      "weather",