carefull -> careful

ir/be/amd64/TODO

@@ -16,7 +16,7 @@ Correctness:
 
 Improve Quality:
 - Immediate32 matching could be better and match SymConst, Add(SymConst, Const)
-  combinations where possible. Be carefull with PIC code this may usually not
+  combinations where possible. Be careful with PIC code this may usually not
   be legal!
 - Match Immediate + Address mode for Cmp
 - Support swapping of cmp arguments (see ins_permuted in ia32 backend)

scripts/ir_spec.py

@@ -855,7 +855,7 @@ class Unknown:
 	"""Returns an unknown (at compile- and runtime) value. It is a valid
 	optimization to replace an Unknown by any other constant value.
 
-	Be carefull when optimising Unknown values, you cannot simply replace
+	Be careful when optimising Unknown values, you cannot simply replace
 	Unknown+x or Unknown<x with a new Unknown node if there are multiple
 	users of the original unknown node!"""
 	knownBlock = True