docs: Remove latin abbreviations from comments.

google-cloud-firestore/src/main/java/com/google/cloud/firestore/AggregateField.java

@@ -137,7 +137,7 @@ String getAlias() {
 
   /**
    * Returns the field on which the aggregation takes place. Returns an empty string if there's no
-   * field (e.g. for count).
+   * field (this applies to count).
    */
   @Nonnull
   String getFieldPath() {

google-cloud-firestore/src/main/java/com/google/cloud/firestore/AggregateQuery.java

@@ -210,7 +210,8 @@ RunAggregationQueryRequest toProto(@Nullable final ByteString transactionId) {
         request.getStructuredAggregationQueryBuilder();
     structuredAggregationQuery.setStructuredQuery(runQueryRequest.getStructuredQuery());
 
-    // We use this set to remove duplicate aggregates. e.g. `aggregate(sum("foo"), sum("foo"))`
+    // We use this set to remove duplicate aggregates.
+    // For example, `aggregate(sum("foo"), sum("foo"))`
     HashSet<String> uniqueAggregates = new HashSet<>();
     List<StructuredAggregationQuery.Aggregation> aggregations = new ArrayList<>();
     int aggregationNum = 0;

google-cloud-firestore/src/main/java/com/google/cloud/firestore/CollectionReference.java

@@ -59,8 +59,8 @@ public class CollectionReference extends Query {
   }
 
   /**
-   * The id of a collection refers to the last component of path pointing to a collection, e.g.
-   * "collection-id" in "projects/project-id/databases/database-id/documents/collection-id".
+   * The id of a collection refers to the last component of path pointing to a collection, for
+   * example "collection-id" in "projects/project-id/databases/database-id/documents/collection-id".
    *
    * @return The ID of the collection.
    */
@@ -121,10 +121,10 @@ public DocumentReference document(@Nonnull String childPath) {
   /**
    * Retrieves the list of documents in this collection.
    *
-   * <p>The document references returned may include references to "missing documents", i.e.
+   * <p>The document references returned may include references to "missing documents", specifically
    * document locations that have no document present but which contain subcollections with
-   * documents. Attempting to read such a document reference (e.g. via `get()` or `onSnapshot()`)
-   * will return a `DocumentSnapshot` whose `exists()` method returns false.
+   * documents. Attempting to read such a document reference (for example via `get()` or
+   * `onSnapshot()`) will return a `DocumentSnapshot` whose `exists()` method returns false.
    *
    * @return The list of documents in this collection.
    */

google-cloud-firestore/src/main/java/com/google/cloud/firestore/DocumentChange.java

@@ -73,17 +73,17 @@ public QueryDocumentSnapshot getDocument() {
 
   /**
    * The index of the changed document in the result set immediately prior to this DocumentChange
-   * (i.e. supposing that all prior DocumentChange objects have been applied). Returns -1 for
-   * 'added' events.
+   * (specifically, supposing that all prior DocumentChange objects have been applied). Returns -1
+   * for 'added' events.
    */
   public int getOldIndex() {
     return oldIndex;
   }
 
   /**
-   * The index of the changed document in the result set immediately after this DocumentChange (i.e.
-   * supposing that all prior DocumentChange objects and the current DocumentChange object have been
-   * applied). Returns -1 for 'removed' events.
+   * The index of the changed document in the result set immediately after this DocumentChange
+   * (specifically, supposing that all prior DocumentChange objects and the current DocumentChange
+   * object have been applied). Returns -1 for 'removed' events.
    */
   public int getNewIndex() {
     return newIndex;

google-cloud-firestore/src/main/java/com/google/cloud/firestore/DocumentReference.java

@@ -68,7 +68,7 @@ public Firestore getFirestore() {
   }
 
   /**
-   * The id of a document refers to the last component of path pointing to a document, e.g.
+   * The id of a document refers to the last component of path pointing to a document, for example
    * "document-id" in "projects/project-id/databases/database-id/document-id".
    *
    * @return The ID of the document.

google-cloud-firestore/src/main/java/com/google/cloud/firestore/Query.java

@@ -934,7 +934,8 @@ public Query where(com.google.cloud.firestore.Filter filter) {
             + "startAfter(), endBefore() or endAt().");
     FilterInternal parsedFilter = parseFilter(filter);
     if (parsedFilter.getFilters().isEmpty()) {
-      // Return the existing query if not adding any more filters (e.g. an empty composite filter).
+      // Return the existing query if not adding any more filters (for example an empty composite
+      // filter).
       return this;
     }
     Builder newOptions = options.toBuilder();
@@ -1923,7 +1924,8 @@ boolean shouldRetryQuery(
    *
    * <p>Using the returned query to count the documents is efficient because only the final count,
    * not the documents' data, is downloaded. The returned query can even count the documents if the
-   * result set would be prohibitively large to download entirely (e.g. thousands of documents).
+   * result set would be prohibitively large to download entirely (for example thousands of
+   * documents).
    *
    * @return a query that counts the documents in the result set of this query.
    */
@@ -1938,7 +1940,7 @@ public AggregateQuery count() {
    *
    * <p>Using this function to perform aggregations is efficient because only the final aggregation
    * values, not the documents' data, is downloaded. This function can even perform aggregations of
-   * the documents if the result set would be prohibitively large to download entirely (e.g.
+   * the documents if the result set would be prohibitively large to download entirely (for example
    * thousands of documents).
    *
    * @return an {@link AggregateQuery} that performs aggregations on the documents in the result set