Mention UNAME_RELEASE in is_special() docstring.

1 files changed, 3 insertions, 2 deletions

diff --git a/kconfiglib.py b/kconfiglib.py
index 665bf19..e05d36f 100644
--- a/kconfiglib.py
+++ b/kconfiglib.py
@@ -2702,8 +2702,9 @@ class Symbol(Item, _HasVisibility):
         return self.is_defined_
 
     def is_special(self):
-        """Returns True if the symbol is one of the special symbols n, m or y,
-        or gets its value from the environment. Otherwise, returns False."""
+        """Returns True if the symbol is one of the special symbols n, m, y, or
+        UNAME_RELEASE, or gets its value from the environment. Otherwise,
+        returns False."""
         return self.is_special_
 
     def is_from_environment(self):