fix #1886 - readline completer with space

news/fix-readline-completer.rst

@@ -0,0 +1,13 @@
+**Added:** None
+
+**Changed:** None
+
+**Deprecated:** None
+
+**Removed:** None
+
+**Fixed:**
+
+* Fixed readline completer issue when cmd alias contains space (e.g. ``ls``).
+
+**Security:** None

xonsh/readline_shell.py

@@ -261,7 +261,7 @@ class ReadlineShell(BaseShell, cmd.Cmd):
         _rebind_case_sensitive_completions()
 
         line = builtins.aliases.expand_alias(line)
-        mline = line.partition(' ')[2]
+        mline = line.rpartition(' ')[2]
         offs = len(mline) - len(text)
         if self.completer is None:
             x = []