Index: src/wp-admin/css/themes.css
===================================================================
--- src/wp-admin/css/themes.css	(revision 38786)
+++ src/wp-admin/css/themes.css	(working copy)
@@ -1017,7 +1017,7 @@
 }
 
 .theme-install-php .wp-filter {
-	padding: 0 20px;
+	padding-left: 20px;
 }
 
 .theme-install-php a.upload,
Index: src/wp-admin/includes/class-wp-media-list-table.php
===================================================================
--- src/wp-admin/includes/class-wp-media-list-table.php	(revision 38786)
+++ src/wp-admin/includes/class-wp-media-list-table.php	(working copy)
@@ -262,7 +262,7 @@
 
 	<div class="search-form">
 		<label for="media-search-input" class="screen-reader-text"><?php esc_html_e( 'Search Media' ); ?></label>
-		<input type="search" placeholder="<?php esc_attr_e( 'Search' ) ?>" id="media-search-input" class="search" name="s" value="<?php _admin_search_query(); ?>"></div>
+		<input type="search" placeholder="<?php esc_attr_e( 'Search media items...' ) ?>" id="media-search-input" class="search" name="s" value="<?php _admin_search_query(); ?>"></div>
 	</div>
 	<?php
 	}
Index: src/wp-admin/includes/plugin-install.php
===================================================================
--- src/wp-admin/includes/plugin-install.php	(revision 38786)
+++ src/wp-admin/includes/plugin-install.php	(working copy)
@@ -263,7 +263,7 @@
 			<option value="tag"<?php selected( 'tag', $type ); ?>><?php _ex( 'Tag', 'Plugin Installer' ); ?></option>
 		</select>
 		<label><span class="screen-reader-text"><?php _e( 'Search Plugins' ); ?></span>
-			<input type="search" name="s" value="<?php echo esc_attr( $term ) ?>" class="wp-filter-search" placeholder="<?php esc_attr_e( 'Search Plugins' ); ?>" />
+			<input type="search" name="s" value="<?php echo esc_attr( $term ) ?>" class="wp-filter-search" placeholder="<?php esc_attr_e( 'Search plugins...' ); ?>" />
 		</label>
 		<?php submit_button( __( 'Search Plugins' ), 'hide-if-js', false, false, array( 'id' => 'search-submit' ) ); ?>
 	</form><?php
Index: src/wp-includes/js/media/views/search.js
===================================================================
--- src/wp-includes/js/media/views/search.js	(revision 38786)
+++ src/wp-includes/js/media/views/search.js	(working copy)
@@ -16,7 +16,7 @@
 
 	attributes: {
 		type:        'search',
-		placeholder: l10n.search
+		placeholder: l10n.searchMediaPlaceholder
 	},
 
 	events: {
Index: src/wp-includes/js/media-views.js
===================================================================
--- src/wp-includes/js/media-views.js	(revision 38786)
+++ src/wp-includes/js/media-views.js	(working copy)
@@ -7069,7 +7069,7 @@
 
 	attributes: {
 		type:        'search',
-		placeholder: l10n.search
+		placeholder: l10n.searchMediaPlaceholder
 	},
 
 	events: {
Index: src/wp-includes/media.php
===================================================================
--- src/wp-includes/media.php	(revision 38786)
+++ src/wp-includes/media.php	(working copy)
@@ -3420,6 +3420,7 @@
 		'filterByDate'           => __( 'Filter by date' ),
 		'filterByType'           => __( 'Filter by type' ),
 		'searchMediaLabel'       => __( 'Search Media' ),
+		'searchMediaPlaceholder' => __( 'Search media items...' ), // placeholder (no ellipsis)
 		'noMedia'                => __( 'No media files found.' ),
 
 		// Library Details