* lisp/textmodes/flyspell.el (flyspell-incorrect, flyspell-duplicate):

* lisp/progmodes/flymake.el (flymake-errline, flymake-warnline):
Use underline style wave on terminals that support it. 

* src/xfaces.c (tty_supports_face_attributes_p): Return 0 for the case
of (supports :underline (:style wave)).

Fixes: debbugs:13000

1 files changed, 3 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index d826ec37458..29e0d5a9fe5 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -205,6 +205,9 @@ property using the supplied face spec.
 *** Face specs set via Custom themes now replace the `defface' spec
 rather than inheriting from it (as do face specs set via Customize).
 
+*** New face characteristic (supports :underline (:style wave))
+specifies whether or not the terminal can display a wavy line.
+
 ** time-to-seconds is not obsolete any more.
 ** New function special-form-p.
 ** Docstrings can be made dynamic by adding a `dynamic-docstring-function'