add get_sep to tools and use in completionwrap

xonsh/completer.py

@@ -9,7 +9,7 @@ import subprocess
 import sys
 
 from xonsh.built_ins import iglobpath
-from xonsh.tools import subexpr_from_unbalanced
+from xonsh.tools import subexpr_from_unbalanced, get_sep
 from xonsh.tools import ON_WINDOWS
 
 
@@ -85,7 +85,7 @@ def completionwrap(s):
     a 'problem' token that will confuse the xonsh parser
     """
     space = ' '
-    slash = '/'
+    slash = get_sep()
     return (_normpath(repr(s + (slash if os.path.isdir(s) else '')))
            if COMPLETION_WRAP_TOKENS.intersection(s) else
            s + space

xonsh/tools.py

@@ -204,6 +204,14 @@ def indent(instr, nspaces=4, ntabs=0, flatten=False):
     else:
         return outstr
 
+def get_sep():
+    """ Returns the appropriate filepath separator char depending on OS and
+    xonsh options set
+    """
+    return (os.altsep if ON_WINDOWS 
+            and builtins.__xonsh_env__.get('FORCE_POSIX_PATHS') else
+            os.sep)
+
 
 TERM_COLORS = {
     # Reset