typos

bin/README

@@ -60,13 +60,13 @@ Some other remarks about the compiler:
 
 - the "-upto ..." argument makes the compiler stop after a certain phase and
   print the AST (or assembly) at that point. E.g. when you are implementing
-  context analysis and want to compare your output to that of the refrence
+  context analysis and want to compare your output to that of the reference
   compiler, use "-upto context" or "-upto context -v 2".
 
 - The generated assembly code contains comments that shows to which CiviC code
   it corresponds. This can be used for relating instructions to AST nodes
   during debugging, and we recommend you do the same in your own compiler
   (although it is not required). Note that the last optimization phase
-  (peephpole optimization) strips these comments, so you will need to pass "-v
+  (peephole optimization) strips these comments, so you will need to pass "-v
   2" or -noopt to actually see them. You can also disable them completely by
   passing "-v 0".