[breaking] remove support of the legacy youtrack format

Author: astanin

tabulate/__init__.py

@@ -627,16 +627,6 @@ def escape_empty(val):
         padding=1,
         with_header_hide=None,
     ),
-    "youtrack": TableFormat(
-        lineabove=None,
-        linebelowheader=None,
-        linebetweenrows=None,
-        linebelow=None,
-        headerrow=DataRow("|| ", " || ", " || "),
-        datarow=DataRow("| ", " | ", " |"),
-        padding=1,
-        with_header_hide=None,
-    ),
     "html": TableFormat(
         lineabove=_html_begin_table_without_header,
         linebelowheader="",
@@ -766,7 +756,6 @@ def escape_empty(val):
 # TODO: Add multiline support for the remaining table formats:
 #       - mediawiki: Replace \n with <br>
 #       - moinmoin: TBD
-#       - youtrack: TBD
 #       - html: Replace \n with <br>
 #       - latex*: Use "makecell" package: In header, replace X\nY with
 #         \thead{X\\Y} and in data row, replace X\nY with \makecell{X\\Y}

test/test_output.py

@@ -2530,19 +2530,6 @@ def test_moinmoin():
     assert_equal(expected, result)
 
 
-def test_youtrack():
-    "Output: youtrack with headers"
-    expected = "\n".join(
-        [
-            "||  strings    ||    numbers  ||",
-            "|  spam       |    41.9999  |",
-            "|  eggs       |   451       |",
-        ]
-    )
-    result = tabulate(_test_table, _test_table_headers, tablefmt="youtrack")
-    assert_equal(expected, result)
-
-
 def test_moinmoin_headerless():
     "Output: moinmoin without headers"
     expected = "\n".join(