[tracker] Revert "libtracker-data: Wrap BIND argument with () in SQL"

[Carlos Garnacho <carlosg src gnome org>]

commit 454272aa6091c8d92266e689842b1e985084d1f0
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Nov 21 15:53:26 2016 +0100

    Revert "libtracker-data: Wrap BIND argument with () in SQL"
    
    This reverts commit 8fc47cfed03030e5377bc7989e5afd24e9b24c5b.
    
    Too easy to be true, it breaks other legit situations.

 src/libtracker-data/tracker-sparql-pattern.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/libtracker-data/tracker-sparql-pattern.vala b/src/libtracker-data/tracker-sparql-pattern.vala
index d37474b..6a67679 100644
--- a/src/libtracker-data/tracker-sparql-pattern.vala
+++ b/src/libtracker-data/tracker-sparql-pattern.vala
@@ -1130,9 +1130,9 @@ class Tracker.Sparql.Pattern : Object {
                                if (in_group_graph_pattern) {
                                        // Surround the entire group graph pattern with
                                        // SELECT $binding , * FROM (...)
-                                       var binding_sql = new StringBuilder ("SELECT (");
+                                       var binding_sql = new StringBuilder ("SELECT ");
                                        add_variable_binding (binding_sql, binding, VariableState.BOUND);
-                                       binding_sql.append (") * FROM (");
+                                       binding_sql.append (" * FROM (");
                                        sql.insert (group_graph_pattern_start, binding_sql.str);
                                        sql.append (")");
                                } else {