fixes a to_chat runtime, lints now throw an error if a to_chat proc lacks a target argument (#21827)

* untested :)

* i may be stupid

* there we go

code/modules/reagents/chemistry/machinery/chem_dispenser.dm

@@ -313,7 +313,7 @@
 	if(stat & BROKEN)
 		return
 	if(!anchored)
-		to_chat("<span class='warning'>[src] must be anchored first!</span>")
+		to_chat(user, "<span class='warning'>[src] must be anchored first!</span>")
 		return
 	ui_interact(user)
 

tools/ci/check_grep2.py

@@ -16,7 +16,7 @@ IGNORE_515_PROC_MARKER_FILENAME = "__byond_version_compat.dm"
 CHECK_515_PROC_MARKER_RE = re.compile(r"\.proc/")
 def check_515_proc_syntax(lines):
     for idx, line in enumerate(lines):
-        if CHECK_515_PROC_MARKER_RE.match(line):
+        if CHECK_515_PROC_MARKER_RE.search(line):
             return Failure(idx + 1, "Outdated proc reference use detected in code. Please use proc reference helpers.")
 
 
@@ -89,6 +89,11 @@ def check_proc_args_with_var_prefix(lines):
         if PROC_ARGS_WITH_VAR_PREFIX_RE.match(line):
             return Failure(idx + 1, "Changed files contains a proc argument starting with 'var'.")
 
+TO_CHAT_WITH_NO_USER_ARG_RE = re.compile(r"to_chat\(\"")
+def check_to_chats_have_a_user_arguement(lines):
+    for idx, line in enumerate(lines):
+        if TO_CHAT_WITH_NO_USER_ARG_RE.search(line):
+            return Failure(idx + 1, "Changed files contains a to_chat() procedure without a user argument.")
 
 CODE_CHECKS = [
     check_space_indentation,
@@ -96,6 +101,7 @@ CODE_CHECKS = [
     check_trailing_newlines,
     check_global_vars,
     check_proc_args_with_var_prefix,
+    check_to_chats_have_a_user_arguement,
 ]