Fix Travis grep script to use PCRE to actually match things (#47065)

Several of the greps were missing the `-P` switch which caused them to 
fail to match things. The EOL grep also wasn't working right so I 
replaced it with the one I added to TGMC.

code/controllers/configuration/configuration.dm

@@ -421,4 +421,4 @@ Example config:
 
 //Message admins when you can.
 /datum/controller/configuration/proc/DelayedMessageAdmins(text)
-	addtimer(CALLBACK(GLOBAL_PROC, /proc/message_admins, text), 0)
+	addtimer(CALLBACK(GLOBAL_PROC, /proc/message_admins, text), 0)

code/controllers/configuration/entries/comms.dm

@@ -25,4 +25,4 @@
 /datum/config_entry/string/medal_hub_address
 
 /datum/config_entry/string/medal_hub_password
-	protection = CONFIG_ENTRY_HIDDEN
+	protection = CONFIG_ENTRY_HIDDEN