Remove tabs from HTML files

From https://google.github.io/styleguide/htmlcssguide.html
"Indentation
Indent by 2 spaces at a time.

Don't use tabs or mix tabs and spaces for indentation."

Tested: Manual regression testing on a Witherspoon.
Change-Id: Ief7137dabc869b73b73f9947337fbb0abb5ca497
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/app/common/directives/loader.html b/app/common/directives/loader.html
index fd6e0cb..d3026dc 100644
--- a/app/common/directives/loader.html
+++ b/app/common/directives/loader.html
@@ -1,4 +1,4 @@
 <div class="loader__wrapper" ng-show="loading"><svg class="loader" viewBox="25 25 50 50">
-	<circle class="loader__path" cx="50" cy="50" r="20"/></circle>
+  <circle class="loader__path" cx="50" cy="50" r="20"/></circle>
 </svg></div>
 <div class="loader__overlay" ng-show="loading"></div>
\ No newline at end of file