patch 8.2.1771: synIDattr() cannot get the value of ctermul
Problem: synIDattr() cannot get the value of ctermul.
Solution: Add the "ul" value for "what". (closes #7037)
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 58c390e..6bf205d 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -10348,7 +10348,9 @@
"bg" background color (as with "fg")
"font" font name (only available in the GUI)
|highlight-font|
- "sp" special color (as with "fg") |highlight-guisp|
+ "sp" special color for the GUI (as with "fg")
+ |highlight-guisp|
+ "ul" underline color for cterm: number as a string
"fg#" like "fg", but for the GUI and the GUI is
running the name in "#RRGGBB" form
"bg#" like "fg#" for "bg"