Add "none" tablefmt which doesn't do any formatting

tabulate/__init__.py

@@ -102,6 +102,9 @@ def _is_file(f):
 )
 
 
+def _none_row(cell_values, colwidths, colaligns):
+    return " ".join(filter(len, map(lambda x: x.strip(), cell_values)))
+
 def _is_separating_line(row):
     row_type = type(row)
     is_sl = (row_type == list or row_type == str) and (
@@ -330,6 +333,16 @@ def escape_empty(val):
         padding=0,
         with_header_hide=None,
     ),
+    "none": TableFormat(
+        lineabove=None,
+        linebelowheader=None,
+        linebetweenrows=None,
+        linebelow=None,
+        headerrow=_none_row,
+        datarow=_none_row,
+        padding=0,
+        with_header_hide=None,
+    ),
     "grid": TableFormat(
         lineabove=Line("+", "-", "+", "+"),
         linebelowheader=Line("+", "=", "+", "+"),
@@ -1724,6 +1737,14 @@ def tabulate(
     eggs  451
     ----  --------
 
+    "none" applies no formatting and outputs each column stripped of
+    leading and trailing whitespace only putting whitespace between
+    non-empty columns.
+
+    >>> print(tabulate([["spam", "  ", 41.9999], ["eggs", "a", "451.0"]], tablefmt="none"))
+    spam 41.9999
+    eggs a 451
+
     "grid" is similar to tables produced by Emacs table.el package or
     Pandoc grid_tables: