Previously experimental checks now made effective

The dates indicate when each check was originally implemented as temporarily experimental.

Promoted on Universal profile:
  - 2023/Oct/13 com.google.fonts/check/legacy_accents
  - 2023/Oct/20 com.google.fonts/check/arabic_high_hamza

Promoted on Google Fonts profile
  - 2023/Oct/12 com.google.fonts/check/metadata/empty_designer
  - 2023/Oct/13 com.google.fonts/check/family/equal_codepoint_coverage
  - 2023/Nov/02 com.google.fonts/check/glyphsets/shape_languages

CHANGELOG.md

@@ -23,6 +23,18 @@ A more detailed list of changes is available in the corresponding milestones for
 #### Added to the Google Fonts Profile
   - **[com.google.fonts/check/metadata/has_tags]:** Check that the font family appears in the tags spreadsheet. (issues #4465 & #4470)
 
+### Previously experimental checks now made effective
+The dates indicate when each check was originally implemented as temporarily experimental.
+
+#### Promoted on Universal profile
+  - 2023/Oct/13: **com.google.fonts/check/legacy_accents**
+  - 2023/Oct/20: **com.google.fonts/check/arabic_high_hamza**
+
+#### Promoted on Google Fonts profile
+  - 2023/Oct/12: **com.google.fonts/check/metadata/empty_designer**
+  - 2023/Oct/13: **com.google.fonts/check/family/equal_codepoint_coverage**
+  - 2023/Nov/02: **com.google.fonts/check/glyphsets/shape_languages**
+
 ### Migration of checks
 #### Moved to the Google Fonts profile
   - **[com.google.fonts/check/varfont/bold_wght_coord]:** from the Open Type profile. (issue #4436)

Lib/fontbakery/profiles/googlefonts.py

@@ -843,7 +843,6 @@ def com_google_fonts_check_metadata_category(family_metadata):
     id="com.google.fonts/check/family/equal_codepoint_coverage",
     conditions=["are_ttf", "stylenames_are_canonical"],
     proposal="https://github.com/fonttools/fontbakery/issues/4180",
-    experimental="Since 2023/Oct/13",
 )
 def com_google_fonts_check_family_equal_codepoint_coverage(ttFonts, config):
     """Fonts have equal codepoint coverage"""
@@ -3527,7 +3526,6 @@ def get_sibling_scripts(target):
         "network"
     ],  # use Shaperglot, which uses youseedee, which downloads Unicode files
     proposal=["https://github.com/googlefonts/fontbakery/issues/4147"],
-    experimental="Since 2023/Nov/02",
 )
 def com_google_fonts_check_glyphsets_shape_languages(ttFont, config):
     """Shapes languages in all GF glyphsets."""
@@ -7451,7 +7449,6 @@ def com_google_fonts_check_description_noto_has_article(font):
         be mentioned in the designer field.
     """,
     proposal="https://github.com/fonttools/fontbakery/issues/3961",
-    experimental="Since 2023/Oct/12",
 )
 def com_google_fonts_check_metadata_empty_designer(family_metadata):
     """At least one designer is declared in METADATA.pb"""

Lib/fontbakery/profiles/universal.py

@@ -696,7 +696,6 @@ def com_google_fonts_check_whitespace_ink(ttFont):
         U+0060 (GRAVE ACCENT) is used in Markdown to notify code blocks,
         and ^ is used as an exponential operator in maths.
     """,
-    experimental="Since 2023/Oct/13",
 )
 def com_google_fonts_check_legacy_accents(ttFont):
     """Check that legacy accents aren't used in composite glyphs."""
@@ -841,7 +840,6 @@ def com_google_fonts_check_arabic_spacing_symbols(ttFont):
         Not doing so effectively makes the font useless for Jawi and
         possibly Kazakh as well.
     """,
-    experimental="Since 2023/Oct/20",
     severity=4,
 )
 def com_google_fonts_check_arabic_high_hamza(ttFont):