Remove trailing whitespace at end of line

With the exception of test output files no text file should have extra
whitesapce and the end of line.

contrib/pg_tde/documentation/_resource/overrides/main.html

@@ -39,7 +39,7 @@
                          {% include "partials/nav.html" %}
                          <br>
                          <label class="md-nav__title" for="__drawer">
-       </label> 
+                         </label>
                        </div>
                      </div>
                    </div>

contrib/pg_tde/expected/change_access_method.out

@@ -16,7 +16,6 @@ CREATE TABLE country_table (
      country_name varchar(32) unique not null,
      continent    varchar(32) not null
 ) USING tde_heap;
- 
 INSERT INTO country_table (country_name, continent)
      VALUES ('Japan', 'Asia'),
             ('UK', 'Europe'),
@@ -158,7 +157,6 @@ CREATE TABLE country_table3 (
      continent    text not null
 ) USING heap;
 ERROR:  pg_tde.enforce_encryption is ON, only the tde_heap access method is allowed.
- 
 ALTER TABLE country_table SET ACCESS METHOD heap;
 ERROR:  pg_tde.enforce_encryption is ON, only the tde_heap access method is allowed.
 ALTER TABLE country_table2 SET ACCESS METHOD tde_heap;

contrib/pg_tde/expected/default_principal_key.out

@@ -48,7 +48,6 @@ SELECT  key_provider_id, key_provider_name, key_name
 		FROM pg_tde_key_info();
 ERROR:  Principal key does not exists for the database
 HINT:  Use set_key interface to set the principal key
- 
 -- Should succeed: "localizes" the default principal key for the database
 CREATE TABLE test_enc(
 	id SERIAL,