Merge "Linker: Do not localize links to other wikis in comments"

diff --combined includes/Linker.php
index 5845532,9ae7cc6..f2e4ac4
--- 1/includes/Linker.php
--- 2/includes/Linker.php
+++ b/includes/Linker.php
@@@ -1331,7 -1331,10 +1331,10 @@@ class Linker 
                        $link = Linker::makeExternalLink(
                                WikiMap::getForeignURL(
                                        $wikiId,
-                                       $title->getPrefixedText(),
+                                       $title->getNamespace() === 0
+                                               ? $title->getDBkey()
+                                               : MWNamespace::getCanonicalName( $title->getNamespace() ) . ':'
+                                                       . $title->getDBkey(),
                                        $title->getFragment()
                                ),
                                $text,
@@@ -1882,6 -1885,7 +1885,6 @@@
         * @return string HTML output
         */
        public static function formatHiddenCategories( $hiddencats ) {
 -
                $outText = '';
                if ( count( $hiddencats ) > 0 ) {
                        # Construct the HTML

diff --combined tests/phpunit/includes/LinkerTest.php
index 3e3fb0f,d684a43..f4844f8
--- 1/tests/phpunit/includes/LinkerTest.php
--- 2/tests/phpunit/includes/LinkerTest.php
+++ b/tests/phpunit/includes/LinkerTest.php
@@@ -265,6 -265,7 +265,6 @@@ class LinkerTest extends MediaWikiLangT
         * @dataProvider provideCasesForFormatLinksInComment
         */
        public function testFormatLinksInComment( $expected, $input, $wiki ) {
 -
                $conf = new SiteConfiguration();
                $conf->settings = [
                        'wgServer' => [
@@@ -306,6 -307,11 +306,11 @@@
                                'foo bar [[Special:BlankPage]]',
                                'enwiki',
                        ],
+                       [
+                               'foo bar <a class="external" rel="nofollow" href="//en.example.org/w/File:Example">Image:Example</a>',
+                               'foo bar [[Image:Example]]',
+                               'enwiki',
+                       ],
                ];
                // @codingStandardsIgnoreEnd
        }