Improve rationale for hinting/smart_dropout

Providing better fixing instructions. com.google.fonts/check/smart_dropout On the Google Fonts Profile. (PR #4570)
fonttools · Mar 5, 2024 · ef70fc4 · ef70fc4
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -48,6 +48,7 @@ A more detailed list of changes is available in the corresponding milestones for
   - **[com.google.fonts/check/metadata/copyright_max_length]:** Added rationale. (PR #4570)
   - **[com.google.fonts/check/metadata/nameid/copyright]:** Added rationale. (PR #4570)
   - **[com.google.fonts/check/has_ttfautohint_params]:** Added rationale. (PR #4570)
+  - **[com.google.fonts/check/smart_dropout]:** Improve rationale with better fixing instructions. (PR #4570)
 
 #### On the FontValidator profile
   - **[com.google.fonts/check/fontvalidator]:** Added rationale. (PR #4570)

diff --git a/Lib/fontbakery/checks/googlefonts/hinting.py b/Lib/fontbakery/checks/googlefonts/hinting.py
@@ -327,6 +327,9 @@ def ttfautohint_version(values):
 
         For more detailed info (such as other rules not enabled in this snippet),
         please refer to the TrueType Instruction Set documentation.
+
+        Generally this occurs with unhinted fonts; if you are not using autohinting,
+        use gftools-fix-nonhinting (or just gftools-fix-font) to fix this issue.
     """,
     proposal="legacy:check/072",
 )