Small fixes as per @certik's review.

IPython/core/magics/basic.py

@@ -71,7 +71,7 b' class BasicMagics(Magics):'
             mode = parameter_s.split()[0][1:]
             if mode == 'rest':
                 rest_docs = []
-        except:
+        except IndexError:
             pass
 
         magic_docs = []

IPython/core/magics/code.py

@@ -259,8 +259,8 b' class CodeMagics(Magics):'
                         except IOError:
                             filename = make_filename(args)
                             if filename is None:
-                                warn('The file `%s` where `%s` was defined cannot '
-                                     'be read.' % (filename,data))
+                                warn('The file `%s` where `%s` was defined '
+                                     'cannot be read.' % (filename, data))
                                 return
                     use_temp = False