master 93f87a3190: Make `C-u C-x =' be more verbose about invisible characters

[Lars Ingebrigtsen]

branch: master
commit 93f87a3190f9efebe0e2db0cd5cfe5aeac6b64c3
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Make `C-u C-x =' be more verbose about invisible characters
    
    * lisp/descr-text.el (describe-text-properties-1): Note confusing
    bits about invisible characters (bug#3400).
---
 lisp/descr-text.el | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lisp/descr-text.el b/lisp/descr-text.el
index a816088932..0f01ad676a 100644
--- a/lisp/descr-text.el
+++ b/lisp/descr-text.el
@@ -176,6 +176,10 @@ otherwise."
        (insert "\n"))
       ;; Text properties
       (when properties
+        (when (plist-get properties 'invisible)
+          (insert "\nNote that character has an invisibility property,\n"
+                  "  so the character displayed at point in the buffer may\n"
+                  "  differ from the character described here.\n"))
        (newline)
        (insert "There are text properties here:\n")
        (describe-property-list properties)))))