Remove "\M-" readline bindings

They conflict with 8-bit encodings

closes gh-88

IPython/config/default/ipython_config.py

@@ -97,14 +97,14 b' c = get_config()'
 # Readline 
 # c.InteractiveShell.readline_use = True
 
+# be careful with meta-key ('\M-<x>') bindings, because
+# they conflict with 8-bit encodings (e.g. UTF8)
+
 # c.InteractiveShell.readline_parse_and_bind = [
 #     'tab: complete',
 #     '"\C-l": possible-completions',
 #     'set show-all-if-ambiguous on',
 #     '"\C-o": tab-insert',
-#     '"\M-i": "    "',
-#     '"\M-o": "\d\d\d\d"',
-#     '"\M-I": "\d\d\d\d"',
 #     '"\C-r": reverse-search-history',
 #     '"\C-s": forward-search-history',
 #     '"\C-p": history-search-backward',

IPython/core/interactiveshell.py

@@ -239,15 +239,13 b' class InteractiveShell(Configurable, Magic):'
     readline_merge_completions = CBool(True, config=True)
     readline_omit__names = Enum((0,1,2), default_value=2, config=True)
     readline_remove_delims = Str('-/~', config=True)
+    # don't use \M- bindings by default, because they
+    # conflict with 8-bit encodings. See gh-58,gh-88
     readline_parse_and_bind = List([
             'tab: complete',
             '"\C-l": clear-screen',
             'set show-all-if-ambiguous on',
             '"\C-o": tab-insert',
-            # See bug gh-58 - with \M-i enabled, chars 0x9000-0x9fff
-            # crash IPython.
-            '"\M-o": "\d\d\d\d"',
-            '"\M-I": "\d\d\d\d"',
             '"\C-r": reverse-search-history',
             '"\C-s": forward-search-history',
             '"\C-p": history-search-backward',