[DevTools] Fixed output of string consisting multiple spaces

" ".repeat(10) will produce string with one space in console output.
This CL changed this behavior by replacing white-space:nowrap rule to white-space:pre.

BUG=516989
R=pfeldman@chromium.org

Review URL: https://codereview.chromium.org/1304033003

git-svn-id: svn://svn.chromium.org/blink/trunk@201091 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/devtools/front_end/components/objectValue.css

@@ -60,7 +60,7 @@
 .object-value-regexp,
 .object-value-symbol {
     color: rgb(196, 26, 22);
-    white-space: nowrap;
+    white-space: pre;
     unicode-bidi: -webkit-isolate;
 }