fixed ls_alias for OpenBSD as it lacks the -G switch

IPython/core/alias.py

@@ -69,6 +69,20 b' def default_aliases():'
                           # things which are executable
                           ('lx', 'ls -F -o --color %l | grep ^-..x'),
                           ]
+        elif sys.platform.startswith('openbsd'):
+            # OpenBSD 
+            ls_aliases = [('ls', 'ls -F'),
+                          # long ls
+                          ('ll', 'ls -F -l'),
+                          # ls normal files only
+                          ('lf', 'ls -F -l %l | grep ^-'),
+                          # ls symbolic links
+                          ('lk', 'ls -F -l %l | grep ^l'),
+                          # directories or links to directories,
+                          ('ldir', 'ls -F -l %l | grep /$'),
+                          # things which are executable
+                          ('lx', 'ls -F -l %l | grep ^-..x'),
+                          ]
         else:
             # BSD, OSX, etc.
             ls_aliases = [('ls', 'ls -F -G'),