Fix a crash caused by leading space.

TODO

@@ -1,7 +1,7 @@
 * [X] Add borders around the table.
-* [] Investigate why having a space in the beginning of the line breaks everything.
+* [ ] Investigate why having a space in the beginning of the line breaks everything.
 * [ ] Add more complex slash commands such as \d <table_name>.
-* [] Update README.
+* [ ] Update README.
 * [] Upload rev 2 to PyPI.
 * [ ] Add a new trigger for M-/ that does dumb completion.
 * [ ] Find a way to add documentation to sql commands. This could get tricky.
@@ -16,7 +16,7 @@
 * [] Create a better framework for adding special commands.
     * A dict with special commands as keys.
     * The value can either be a string or a callable.
-* [] Test if the special comands are autocompleted correctly.
+* [X] Test if the special comands are autocompleted correctly.
 * [x] Control smart completion via config file.
 * [x] Figure out how to deal with transactions.
 * [X] Add a config file.

pgcli/pgcompleter.py

@@ -69,7 +69,8 @@ class PGCompleter(Completer):
 
         last_token = ''
         if parsed:
-            last_token = parsed[0].token_prev(len(parsed[0].tokens)).value
+            last_token = parsed[0].token_prev(len(parsed[0].tokens))
+            last_token = last_token.value if last_token else ''
 
         if last_token.lower() in ('select', 'where', 'having', 'set',
                 'order by', 'group by'):

pgcli/pgexecute.py

@@ -16,6 +16,7 @@ class PGExecute(object):
         self.conn.autocommit = True
 
     def run(self, sql):
+        sql = sql.strip()
         with self.conn.cursor() as cur:
             if sql in self.special_commands:
                 cur.execute(self.special_commands[sql])