Fix tests

Author: facelessuser

docs/src/dictionary/en-custom.txt

@@ -250,6 +250,7 @@ XYZ
 Y'CbCr
 YCbCr
 YCbCr
+YPbPr
 Yoshi
 ZCAM
 ZD
@@ -371,6 +372,7 @@ rgb
 sCAM
 sRGB
 sUCS
+sYCC
 seperable
 severities
 smoothstep

tests/test_roundtrip.py

@@ -32,10 +32,10 @@ class Color(Base):
     # HCT will actually provide good conversion at about 11 decimal precision,
     # but certain spaces have a gamma power function that is less accurate with RGB channels near zero
     # (not necessarily near black): Rec. 2020, Rec. 709, etc. HCT, which approximates its inverse transform,
-    # can emphasizes these cases and fall a little below our target of 6. This is expected.
+    # can exasperate these cases and fall a little below our target of 6. This is expected.
     # To handle this in testing, we can specify more nuanced conditions. Provide the default precision,
     # and optional lower precision, and spaces that would trigger this lower precision.
-    SPACES['hct'] = (10, 4, {'rec709', 'rec2020', 'a98-rgb'})
+    SPACES['hct'] = (10, 4, {'rec709', 'rec2020', 'a98-rgb', 'ypbpr709', 'ypbpr2020'})
 
     COLORS = [
         Color('red'),