Deduplicate translations and fix double .

Signed-off-by: Joas Schilling <coding@schilljs.com>

lib/base.php

@@ -249,17 +249,17 @@ class OC {
 
 			if (self::$CLI) {
 				echo $l->t('Cannot write into "config" directory!')."\n";
-				echo $l->t('This can usually be fixed by giving the webserver write access to the config directory')."\n";
+				echo $l->t('This can usually be fixed by giving the webserver write access to the config directory.')."\n";
 				echo "\n";
-				echo $l->t('Or, if you prefer to keep config.php file read only, set the option "config_is_read_only" to true in it.')."\n";
+				echo $l->t('But, if you prefer to keep config.php file read only, set the option "config_is_read_only" to true in it.')."\n";
 				echo $l->t('See %s', [ $urlGenerator->linkToDocs('admin-config') ])."\n";
 				exit;
 			} else {
 				OC_Template::printErrorPage(
 					$l->t('Cannot write into "config" directory!'),
-					$l->t('This can usually be fixed by giving the webserver write access to the config directory.') . '. '
+					$l->t('This can usually be fixed by giving the webserver write access to the config directory.') . ' '
-					. $l->t('Or, if you prefer to keep config.php file read only, set the option "config_is_read_only" to true in it. See %s',
+					. $l->t('But, if you prefer to keep config.php file read only, set the option "config_is_read_only" to true in it.') . ' '
-					[ $urlGenerator->linkToDocs('admin-config') ]),
+					. $l->t('See %s', [ $urlGenerator->linkToDocs('admin-config') ]),
 					503
 				);
 			}