Change order in which things are tried in %edit, so filenames starting with numbers can be edited.

Closes gh-127
Closes gh-55

IPython/core/magic.py

@@ -2275,15 +2275,13 b' Currently the magic system has the following functions:\\n"""'
         use_temp = True
 
         data = ''
-        if args[0].isdigit():
-            # Mode where user specifies ranges of lines, like in %macro.
-            # This means that you can't edit files whose names begin with
-            # numbers this way. Tough.
-            data = self.extract_input_lines(args, opts_raw)
-        elif args.endswith('.py'):
+        if args.endswith('.py'):
             filename = make_filename(args)
             use_temp = False
         elif args:
+            # Mode where user specifies ranges of lines, like in %macro.
+            data = self.extract_input_lines(args, opts_raw)
+            if not data:
             try:
                 # Load the parameter given as a variable. If not a string,
                 # process it as an object instead (below)
@@ -2370,7 +2368,7 b' Currently the magic system has the following functions:\\n"""'
             print
         else:
             print 'done. Executing edited code...'
-            if opts_r:
+            if opts_raw:
                 self.shell.run_cell(file_read(filename))
             else:
                 self.shell.safe_execfile(filename,self.shell.user_ns,