Fix comment typos

Examples/test-suite/lua/operator_overload_runme.lua

@@ -1,4 +1,4 @@
--- demo of lua swig capacilities (operator overloading)
+-- demo of lua swig capacities (operator overloading)
 require("import")	-- the import fn
 import("operator_overload")	-- import lib
 
@@ -33,7 +33,7 @@ assert(b>=c)
 assert(b>d)
 assert(b>=d)
 
--- lua does not support += operators: skiping
+-- lua does not support += operators: skipping
 
 -- test +
 f=Op(1)
@@ -50,7 +50,7 @@ assert(f/g==Op(1))
 
 --lua 5.0.2 defines that unary - is __unm(self,nil)
 --lua 5.1.2 defines that unary - is __unm(self,self)
---C++ expectes unary - as operator-()
+--C++ expects unary - as operator-()
 --however the latest version of SWIG strictly checks the number of args
 --and will complain if too many args are provided
 --therefore disabling these tests for now
@@ -79,7 +79,7 @@ assert(tostring(Op(1))=="Op(1)")
 assert(tostring(Op(-3))=="Op(-3)")
 
 
--- check that operator overloads are correctly propogated down inheritance hierarchy
+-- check that operator overloads are correctly propagated down inheritance hierarchy
 
 a_d=OpDerived()
 b_d=OpDerived(5)