Improve url parsing to allow interpolants

mgreter · xzyfer · commit 499ee5f09a55 · 2015-07-08T16:32:49.000+10:00
Fixes #1273
diff --git a/prelexer.cpp b/prelexer.cpp
@@ -448,6 +448,7 @@ namespace Sass {
         zero_plus <
           alternatives <
             alnum,
+            interpolant,
             exactly <'/'>,
             class_char < uri_chars >
           >
