Add syntax detection for files with ksh shebang lines

CHANGELOG.md

@@ -23,6 +23,7 @@
 - Update quadlet syntax mapping to include *.{build,pod} files #3484 (@cyqsimon)
 - Fix inconsistencies in Ada syntax, see #3481 (@AldanTanneo)
 - Add syntax mapping for podman's `artifact` quadlet files, see #3497 (@xduugu)
+- Highlight Korn Shell scripts (i.e. with a shebang of ...`ksh`) using Bash syntax, see #3509 (@keith-hall)
 
 ## Themes
 

assets/patches/ShellScript.sublime-syntax.patch

@@ -14,7 +14,7 @@ index e973e319..07c170a7 100644
  first_line_match: |
    (?x)
 -    ^\#! .* \b(bash|zsh|sh|tcsh|ash)\b
-+    ^\#! .* \b(bash|zsh|sh|tcsh|ash|dash)\b
++    ^\#! .* \b(bash|zsh|sh|tcsh|ash|dash|ksh)\b
    | ^\# \s* -\*- [^*]* mode: \s* shell-script [^*]* -\*-
 
  #-------------------------------------------------------------------------------

tests/syntax-tests/highlighted/Bash/korn_shell.wrong_ext

@@ -0,0 +1,19 @@
+#!/bin/ksh
+#
+# https://www.qnx.com/developers/docs/6.4.0/neutrino/user_guide/scripts.html
+# tfind:
+# script to look for strings in various files and dump to less
+
+case $# in
+1)
+    find . -name '*.[ch]' | xargs grep $1 | less
+    exit 0   # good status
+esac
+
+echo "Use tfind stuff_to_find                               "
+echo "      where : stuff_to_find = search string           "
+echo "                                                      "
+echo "e.g. tfind console_state looks through all files in   "    
+echo "     the current directory and below and displays all "
+echo "     instances of console_state."
+exit 1    # bad status

tests/syntax-tests/source/Bash/korn_shell.wrong_ext

@@ -0,0 +1,19 @@
+#!/bin/ksh
+#
+# https://www.qnx.com/developers/docs/6.4.0/neutrino/user_guide/scripts.html
+# tfind:
+# script to look for strings in various files and dump to less
+
+case $# in
+1)
+    find . -name '*.[ch]' | xargs grep $1 | less
+    exit 0   # good status
+esac
+
+echo "Use tfind stuff_to_find                               "
+echo "      where : stuff_to_find = search string           "
+echo "                                                      "
+echo "e.g. tfind console_state looks through all files in   "    
+echo "     the current directory and below and displays all "
+echo "     instances of console_state."
+exit 1    # bad status