Allow spaces between = and ; in ASM instructions

During the firstpass, strip spaces from:
 - between the instruction destination and '='
 - between '=' and the instruction ALU ops
 - between the instruction ALU ops and ';'
 - between ';' and the instruction jump

Signed-off-by: Collin J. Doering <collin.doering@rekahsoft.ca>

src/lib/RekahSoft/HackAsm/Parser.hs

@@ -233,11 +233,15 @@ instrLine = do
           cInstr' = do
             dest <- optionMaybe $ try $ do
               (d, _) <- cInstrDest
+              optional spaces
               char '='
+              optional spaces
               return d
             (op, _)   <- cInstrAluOps
             jump <- optionMaybe $ try $ do
+              optional spaces
               char ';'
+              optional spaces
               (j, _) <- cInstrJump
               return j