[clang-format][doc] Add GNU style link in KeepFormFeed option (llvm#176654)

vbvictor · web-flow · commit 42e404512bdd · 2026-02-07T12:01:55.000-08:00
It was not clear from the description what this option does.
Added small example to demostrate its behavior.
diff --git a/clang/docs/ClangFormatStyleOptions.rst b/clang/docs/ClangFormatStyleOptions.rst
@@ -5015,7 +5015,8 @@ the configuration (without a prefix: ``Auto``).
   Keep the form feed character if it's immediately preceded and followed by
   a newline. Multiple form feeds and newlines within a whitespace range are
   replaced with a single newline and form feed followed by the remaining
-  newlines.
+  newlines. (See
+  www.gnu.org/prep/standards/html_node/Formatting.html#:~:text=formfeed.)
 
 .. _LambdaBodyIndentation:
 
diff --git a/clang/include/clang/Format/Format.h b/clang/include/clang/Format/Format.h
@@ -3520,7 +3520,8 @@ struct FormatStyle {
   /// Keep the form feed character if it's immediately preceded and followed by
   /// a newline. Multiple form feeds and newlines within a whitespace range are
   /// replaced with a single newline and form feed followed by the remaining
-  /// newlines.
+  /// newlines. (See
+  /// www.gnu.org/prep/standards/html_node/Formatting.html#:~:text=formfeed.)
   /// \version 20
   bool KeepFormFeed;
 
