Add travis trailing whitespace check (#116)

* Add travis trailing whitespace check

* Remove trailing white space

3 files changed, 24 insertions, 24 deletions

diff --git a/Firebase/Database/Public/FIRDataSnapshot.h b/Firebase/Database/Public/FIRDataSnapshot.h
index e615260..c3082df 100644
--- a/Firebase/Database/Public/FIRDataSnapshot.h
+++ b/Firebase/Database/Public/FIRDataSnapshot.h
@@ -38,7 +38,7 @@ FIR_SWIFT_NAME(DataSnapshot)
 
 /**
  * Gets a FIRDataSnapshot for the location at the specified relative path.
- * The relative path can either be a simple child key (e.g. 'fred') 
+ * The relative path can either be a simple child key (e.g. 'fred')
  * or a deeper slash-separated path (e.g. 'fred/name/first'). If the child
  * location has no data, an empty FIRDataSnapshot is returned.
  *
@@ -59,7 +59,7 @@ FIR_SWIFT_NAME(DataSnapshot)
 
 /**
  * Return YES if the DataSnapshot has any children.
- * 
+ *
  * @return YES if this snapshot has any children, else NO.
  */
 - (BOOL) hasChildren;
@@ -78,7 +78,7 @@ FIR_SWIFT_NAME(DataSnapshot)
 /**
  * Returns the raw value at this location, coupled with any metadata, such as priority.
  *
- * Priorities, where they exist, are accessible under the ".priority" key in instances of NSDictionary. 
+ * Priorities, where they exist, are accessible under the ".priority" key in instances of NSDictionary.
  * For leaf locations with priorities, the value will be under the ".value" key.
  */
 - (id __nullable) valueInExportFormat;
diff --git a/Firebase/Database/Public/FIRDatabase.h b/Firebase/Database/Public/FIRDatabase.h
index ebdbf8a..fd4535f 100644
--- a/Firebase/Database/Public/FIRDatabase.h
+++ b/Firebase/Database/Public/FIRDatabase.h
@@ -29,9 +29,9 @@ NS_ASSUME_NONNULL_BEGIN
  */
 FIR_SWIFT_NAME(Database)
 @interface FIRDatabase : NSObject
-  
+
 /**
- * The NSObject initializer that has been marked as unavailable. Use the `database` 
+ * The NSObject initializer that has been marked as unavailable. Use the `database`
  * method instead
  *
  * @return An instancetype instance
diff --git a/Firebase/Database/Public/FIRDatabaseReference.h b/Firebase/Database/Public/FIRDatabaseReference.h
index eb3fecd..53d0cdd 100644
--- a/Firebase/Database/Public/FIRDatabaseReference.h
+++ b/Firebase/Database/Public/FIRDatabaseReference.h
@@ -74,8 +74,8 @@ FIR_SWIFT_NAME(DatabaseReference)
 
 /** Write data to this Firebase Database location.
 
-This will overwrite any data at this location and all child locations. 
- 
+This will overwrite any data at this location and all child locations.
+
 Data types that can be set are:
 
 - NSString -- @"Hello World"
@@ -86,7 +86,7 @@ Data types that can be set are:
 The effect of the write will be visible immediately and the corresponding
 events will be triggered. Synchronization of the data to the Firebase Database
 servers will also be started.
- 
+
 Passing null for the new value is equivalent to calling remove:;
 all data at this location or any child location will be deleted.
 
@@ -131,7 +131,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 
 /**
  * Remove the data at this Firebase Database location. Any data at child locations will also be deleted.
- * 
+ *
  * The effect of the delete will be visible immediately and the corresponding events
  * will be triggered. Synchronization of the delete to the Firebase Database servers will
  * also be started.
@@ -165,7 +165,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
  * Children with a string as their priority come last. They are sorted lexicographically by priority.
  * Whenever two children have the same priority (including no priority), they are sorted by key. Numeric
  * keys come first (sorted numerically), followed by the remaining keys (sorted lexicographically).
- * 
+ *
  * Note that priorities are parsed and ordered as IEEE 754 double-precision floating-point numbers.
  * Keys are always stored as strings and are treated as numbers only when they can be parsed as a
  * 32-bit integer
@@ -193,7 +193,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 - (void) updateChildValues:(NSDictionary *)values;
 
 /**
- * The same as update: with a block that is called once the update has been committed to the 
+ * The same as update: with a block that is called once the update has been committed to the
  * Firebase Database servers
  *
  * @param values A dictionary of the keys to change and their new values
@@ -553,7 +553,7 @@ is meant to be preserved, you should use setValue:andPriority: instead.
 
 /**
  * Cancel any operations that are set to run on disconnect. If you previously called onDisconnectSetValue:,
- * onDisconnectRemoveValue:, or onDisconnectUpdateChildValues:, and no longer want the values updated when the 
+ * onDisconnectRemoveValue:, or onDisconnectUpdateChildValues:, and no longer want the values updated when the
  * connection is lost, call cancelDisconnectOperations:
  */
 - (void) cancelDisconnectOperations;
@@ -575,19 +575,19 @@ is meant to be preserved, you should use setValue:andPriority: instead.
  * Manually disconnect the Firebase Database client from the server and disable automatic reconnection.
  *
  * The Firebase Database client automatically maintains a persistent connection to the Firebase Database server,
- * which will remain active indefinitely and reconnect when disconnected. However, the goOffline( ) 
- * and goOnline( ) methods may be used to manually control the client connection in cases where 
+ * which will remain active indefinitely and reconnect when disconnected. However, the goOffline( )
+ * and goOnline( ) methods may be used to manually control the client connection in cases where
  * a persistent connection is undesirable.
- * 
+ *
  * While offline, the Firebase Database client will no longer receive data updates from the server. However,
  * all database operations performed locally will continue to immediately fire events, allowing
- * your application to continue behaving normally. Additionally, each operation performed locally 
+ * your application to continue behaving normally. Additionally, each operation performed locally
  * will automatically be queued and retried upon reconnection to the Firebase Database server.
- * 
+ *
  * To reconnect to the Firebase Database server and begin receiving remote events, see goOnline( ).
  * Once the connection is reestablished, the Firebase Database client will transmit the appropriate data
  * and fire the appropriate events so that your client "catches up" automatically.
- * 
+ *
  * Note: Invoking this method will impact all Firebase Database connections.
  */
 + (void) goOffline;
@@ -596,16 +596,16 @@ is meant to be preserved, you should use setValue:andPriority: instead.
  * Manually reestablish a connection to the Firebase Database server and enable automatic reconnection.
  *
  * The Firebase Database client automatically maintains a persistent connection to the Firebase Database server,
- * which will remain active indefinitely and reconnect when disconnected. However, the goOffline( ) 
- * and goOnline( ) methods may be used to manually control the client connection in cases where 
+ * which will remain active indefinitely and reconnect when disconnected. However, the goOffline( )
+ * and goOnline( ) methods may be used to manually control the client connection in cases where
  * a persistent connection is undesirable.
- * 
- * This method should be used after invoking goOffline( ) to disable the active connection. 
+ *
+ * This method should be used after invoking goOffline( ) to disable the active connection.
  * Once reconnected, the Firebase Database client will automatically transmit the proper data and fire
  * the appropriate events so that your client "catches up" automatically.
- * 
+ *
  * To disconnect from the Firebase Database server, see goOffline( ).
- * 
+ *
  * Note: Invoking this method will impact all Firebase Database connections.
  */
 + (void) goOnline;