fixes .placeholder to work as a "grouped selector"

adding the `&` combinator to `.placeholder` makes it work for the global case (in forms.less) as well as within `.navbar-search .search-query`

the result can be seen in the generated bootstrap.css, which include the -ms vendor extension.

1 files changed, 4 insertions, 0 deletions

diff --git a/docs/assets/css/bootstrap.css b/docs/assets/css/bootstrap.css
index 2c0af2199..029e32db7 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -3713,6 +3713,10 @@ input[type="submit"].btn.btn-mini {
   color: #cccccc;
 }
 
+.navbar-search .search-query:-ms-input-placeholder {
+  color: #cccccc;
+}
+
 .navbar-search .search-query::-webkit-input-placeholder {
   color: #cccccc;
 }