Fix spelling

Author: hwalinga

pandas/core/computation/expr.py

@@ -115,7 +115,7 @@ def _replace_spaces_backtickvariables(source):
     ------
     s : str
         Anything that was surrounded by spaces in source is now cleanup up.
-        This is done so that any collumn name with spaces still can be used
+        This is done so that any column name with spaces still can be used
         in query and eval.
     """
     return re.sub(r'`(.*?)`',