OSDOCS-11984:removing trailing quotation

Author: brendan-daly-red-hat

modules/installation-bootstrap-gather.adoc

@@ -51,7 +51,7 @@ $ ./openshift-install gather bootstrap --dir <installation_directory> \ <1>
     --bootstrap <bootstrap_address> \ <2>
     --master <master_1_address> \ <3>
     --master <master_2_address> \ <3>
-    --master <master_3_address>" <3>
+    --master <master_3_address> <3>
 ----
 <1> For `installation_directory`, specify the same directory you specified when you ran `./openshift-install create cluster`. This directory contains the {product-title}
 definition files that the installation program creates.