Fix incorrect Sync terminfo entry

kitty/parser.c

@@ -1129,7 +1129,7 @@ START_ALLOW_CASE_RANGE
 END_ALLOW_CASE_RANGE
             if (screen->parser_buf_pos > 0 && screen->parser_buf[screen->parser_buf_pos-1] == ESC) {
                 if (ch == '\\') { screen->parser_buf_pos--; return true; }
-                REPORT_ERROR("DCS sequence contained non-printable character: 0x%x ignoring the sequence", ESC);
+                REPORT_ERROR("DCS sequence contained ESC without trailing \\ ignoring the sequence");
                 SET_STATE(ESC); return false;
             }
             if (screen->parser_buf_pos >= PARSER_BUF_SZ - 1) {

kitty/terminfo.py

@@ -234,7 +234,7 @@ string_capabilities = {
     'Smulx': r'\E[4:%p1%dm',  # this is a non-standard extension that some terminals use, so match them
     # Enter strikethrough mode
     'smxx': r'\E[9m',
-    'Sync': '\\EP=%p1%ds\\E\\',  # this is a non-standard extension supported by tmux for synchronized updates
+    'Sync': r'\EP=%p1%ds\E\\',  # this is a non-standard extension supported by tmux for synchronized updates
     # Clear all tab stops
     'tbc': r'\E[3g',
     # To status line (used to set window titles)

terminfo/kitty.terminfo

@@ -17,7 +17,7 @@ xterm-kitty|KovIdTTY,
 	lines#24,
 	pairs#32767,
 	Smulx=\E[4:%p1%dm,
-	Sync=\EP=%p1%ds\E\,
+	Sync=\EP=%p1%ds\E\\,
 	acsc=++\,\,--..00``aaffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~,
 	bel=^G,
 	bold=\E[1m,