Update font tests and docs

Author: aatle

docs/reST/ref/font.rst

@@ -518,6 +518,7 @@ solves no longer exists, it will likely be removed in the future.
 
       Set the height in pixels for a line of text with the font. When rendering
       multiple lines of text this refers to the amount of space between lines.
+      The value must be non-negative.
 
       .. versionadded:: 2.5.4
 

src_c/doc/font_doc.h

@@ -29,9 +29,9 @@
 #define DOC_FONT_FONT_METRICS "metrics(text, /) -> list\ngets the metrics for each character in the passed string"
 #define DOC_FONT_FONT_GETITALIC "get_italic() -> bool\ncheck if the text will be rendered italic"
 #define DOC_FONT_FONT_GETLINESIZE "get_linesize() -> int\nget the line space of the font text"
-#define DOC_FONT_FONT_SETLINESIZE "set_linesize(linesize) -> int\nset the line space of the font text"
+#define DOC_FONT_FONT_SETLINESIZE "set_linesize(linesize) -> None\nset the line space of the font text"
 #define DOC_FONT_FONT_GETHEIGHT "get_height() -> int\nget the height of the font"
-#define DOC_FONT_FONT_SETPOINTSIZE "set_point_size(size, /) -> int\nset the point size of the font"
+#define DOC_FONT_FONT_SETPOINTSIZE "set_point_size(size, /) -> None\nset the point size of the font"
 #define DOC_FONT_FONT_GETPOINTSIZE "get_point_size() -> int\nget the point size of the font"
 #define DOC_FONT_FONT_GETASCENT "get_ascent() -> int\nget the ascent of the font"
 #define DOC_FONT_FONT_GETDESCENT "get_descent() -> int\nget the descent of the font"

test/font_test.py

@@ -1,10 +1,10 @@
 # -*- coding: utf-8 -*-
-import sys
-import os
 import io
-import unittest
+import os
 import pathlib
 import platform
+import sys
+import unittest
 
 import pygame
 from pygame import font as pygame_font  # So font can be replaced with ftfont
@@ -409,6 +409,10 @@ def test_set_linesize(self):
         # check invalid linesize
         with self.assertRaises(ValueError):
             f.set_linesize(-1)
+        with self.assertRaises(OverflowError):
+            f.set_linesize(2**100)
+        with self.assertRaises(TypeError):
+            f.set_linesize(12.0)
 
     def test_metrics(self):
         # Ensure bytes decoding works correctly. Can only compare results