scripts/check-pr.sh: add header check (#20212)

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

scripts/check-pr.sh

@@ -87,6 +87,13 @@ function count_commands() {
   grep -c "$regex" "$file"
 }
 
+count_header() {
+  local file="$1"
+  local regex="$2"
+
+  grep -c "$regex" "$file"
+}
+
 function strip_commands() {
   local file="$1"
   local regex="$2"
@@ -112,6 +119,7 @@ function check_outdated_page() {
   local page="$1"
   local english_page="pages/${page#pages*\/}"
   local command_regex='^`[^`]\+`$'
+  local header_regex='^>.*$'
 
   if [[ $page == "$english_page" || ! -f $english_page ]]; then
     return 1
@@ -128,6 +136,12 @@ function check_outdated_page() {
   elif [[ "$english_commands_as_string" != "$commands_as_string" ]]; then
     printf "\x2d $MSG_OUTDATED" "$page" "based on the command contents itself"
   fi
+
+  english_header_lines=$(count_header "$english_page" "$header_regex")
+  header_lines=$(count_header "$page" "$header_regex")
+  if [[ "$english_header_lines" != "$header_lines" ]]; then
+    printf "\x2d $MSG_OUTDATED" "$page" "based on number of header lines"
+  fi
 }
 
 function check_more_info_link() {