Fix get-unsat-assumptions output (#2301)

Fixes #2298. The `get-unsat-assumptions` command was printing the result
with square brackets and commas instead of parentheses and spaces
between the assumptions.

1 files changed, 8 insertions, 4 deletions

diff --git a/src/util/utility.h b/src/util/utility.h
index a9a9a29c3..56a68ca40 100644
--- a/src/util/utility.h
+++ b/src/util/utility.h
@@ -69,16 +69,20 @@ inline InputIterator find_if_unique(InputIterator first, InputIterator last, Pre
 }
 
 template <typename T>
-void container_to_stream(std::ostream& out, const T& container)
+void container_to_stream(std::ostream& out,
+                         const T& container,
+                         const char* prefix = "[",
+                         const char* postfix = "]",
+                         const char* sep = ", ")
 {
-  out << "[";
+  out << prefix;
   bool is_first = true;
   for (const auto& item : container)
   {
-    out << (!is_first ? ", " : "") << item;
+    out << (!is_first ? sep : "") << item;
     is_first = false;
   }
-  out << "]";
+  out << postfix;
 }
 
 }/* CVC4 namespace */