* keymap.c (push_key_description): Print M-TAB as C-M-i.

Fixes: debbugs:11758

1 files changed, 9 insertions, 2 deletions

diff --git a/src/keymap.c b/src/keymap.c
index 4031091501c..85c384b8180 100644
--- a/src/keymap.c
+++ b/src/keymap.c
@@ -2157,7 +2157,7 @@ The `kbd' macro is an approximate inverse of this.  */)
 char *
 push_key_description (EMACS_INT ch, char *p, int force_multibyte)
 {
-  int c, c2;
+  int c, c2, tab_as_ci;
 
   /* Clear all the meaningless bits above the meta bit.  */
   c = ch & (meta_modifier | ~ - meta_modifier);
@@ -2171,6 +2171,8 @@ push_key_description (EMACS_INT ch, char *p, int force_multibyte)
       return p;
     }
 
+  tab_as_ci = (c2 == '\t' && (c & meta_modifier));
+
   if (c & alt_modifier)
     {
       *p++ = 'A';
@@ -2178,7 +2180,8 @@ push_key_description (EMACS_INT ch, char *p, int force_multibyte)
       c -= alt_modifier;
     }
   if ((c & ctrl_modifier) != 0
-      || (c2 < ' ' && c2 != 27 && c2 != '\t' && c2 != Ctl ('M')))
+      || (c2 < ' ' && c2 != 27 && c2 != '\t' && c2 != Ctl ('M'))
+      || tab_as_ci)
     {
       *p++ = 'C';
       *p++ = '-';
@@ -2216,6 +2219,10 @@ push_key_description (EMACS_INT ch, char *p, int force_multibyte)
           *p++ = 'S';
           *p++ = 'C';
         }
+      else if (tab_as_ci)
+        {
+          *p++ = 'i';
+        }
       else if (c == '\t')
         {
           *p++ = 'T';