Merge pull request #8083 from furo321/tpxy-helptext

Document usage of `~` for `/tpxy` in help text.

src/game/server/gamecontext.cpp

@@ -3655,7 +3655,7 @@ void CGameContext::RegisterChatCommands()
 	Console()->Register("rescue", "", CFGFLAG_CHAT | CFGFLAG_SERVER | CMDFLAG_PRACTICE, ConRescue, this, "Teleport yourself out of freeze (use sv_rescue 1 to enable this feature)");
 	Console()->Register("tp", "?r[player name]", CFGFLAG_CHAT | CFGFLAG_SERVER | CMDFLAG_PRACTICE, ConTeleTo, this, "Depending on the number of supplied arguments, teleport yourself to; (0.) where you are spectating or aiming; (1.) the specified player name");
 	Console()->Register("teleport", "?r[player name]", CFGFLAG_CHAT | CFGFLAG_SERVER | CMDFLAG_PRACTICE, ConTeleTo, this, "Depending on the number of supplied arguments, teleport yourself to; (0.) where you are spectating or aiming; (1.) the specified player name");
-	Console()->Register("tpxy", "f[x] f[y]", CFGFLAG_CHAT | CFGFLAG_SERVER | CMDFLAG_PRACTICE, ConTeleXY, this, "Teleport yourself to the specified coordinates");
+	Console()->Register("tpxy", "f[x] f[y]", CFGFLAG_CHAT | CFGFLAG_SERVER | CMDFLAG_PRACTICE, ConTeleXY, this, "Teleport yourself to the specified coordinates. A tilde (~) can be used to denote your current position, e.g. '/tpxy ~1 ~' to teleport one tile to the right");
 	Console()->Register("lasttp", "", CFGFLAG_CHAT | CFGFLAG_SERVER | CMDFLAG_PRACTICE, ConLastTele, this, "Teleport yourself to the last location you teleported to");
 	Console()->Register("tc", "?r[player name]", CFGFLAG_CHAT | CFGFLAG_SERVER | CMDFLAG_PRACTICE, ConTeleCursor, this, "Teleport yourself to player or to where you are spectating/or looking if no player name is given");
 	Console()->Register("telecursor", "?r[player name]", CFGFLAG_CHAT | CFGFLAG_SERVER | CMDFLAG_PRACTICE, ConTeleCursor, this, "Teleport yourself to player or to where you are spectating/or looking if no player name is given");