Trim comments when setting InlineTable (#31)

* Trim comments when setting InlineTable

InlineTable is supposed to be one liner and doesn't support comments in values.

* Add tests

* Fix coverage

Author: frostming

tests/test_items.py

@@ -417,3 +417,14 @@ def test_items_are_pickable():
 
     s = pickle.dumps(n)
     assert pickle.loads(s).as_string() == 'foo = "bar"\n'
+
+
+def test_trim_comments_when_building_inline_table():
+    table = inline_table()
+    row = parse('foo = "bar"  # Comment')
+    table.update(row)
+    assert table.as_string() == '{foo = "bar"}'
+    value = item("foobaz")
+    value.comment("Another comment")
+    table.append("baz", value)
+    assert "# Another comment" not in table.as_string()

tomlkit/items.py

@@ -938,6 +938,8 @@ def append(self, key, _item):  # type: (Union[Key, str], Any) -> InlineTable
         if not isinstance(_item, (Whitespace, Comment)):
             if not _item.trivia.indent and len(self._value) > 0:
                 _item.trivia.indent = " "
+            if _item.trivia.comment:
+                _item.trivia.comment = ""
 
         self._value.append(key, _item)
 
@@ -1017,6 +1019,8 @@ def __setitem__(self, key, value):  # type: (Union[Key, str], Any) -> None
 
         if key is not None:
             super(InlineTable, self).__setitem__(key, value)
+        if value.trivia.comment:
+            value.trivia.comment = ""
 
         m = re.match("(?s)^[^ ]*([ ]+).*$", self._trivia.indent)
         if not m: