Assembling now tolerates extra whitespace between opcode and operand

CHANGES.txt

@@ -7,6 +7,8 @@
   - Fixed BRK on 65C02 so it clears the decimal flag.  On NMOS 6502, the
     decimal flag is unaffected on BRK.  On 65C02, it is always cleared.
 
+  - Assembling now tolerates extra whitespace between opcode and operand.
+
 0.17 (2013-10-26)
 
   - Added support for Python 3.2 and 3.3 based on work by David Beazley.

py65/assembler.py

@@ -145,6 +145,8 @@ class Assembler:
             and parsing the address part using AddressParser.  The result of
             the normalization is a tuple of two strings (opcode, operand).
         """
+        statement = ' '.join(str.split(statement))
+
         # normalize target in operand
         match = self.Statement.match(statement)
         if match:

py65/tests/test_assembler.py

@@ -15,6 +15,9 @@ class AssemblerTests(unittest.TestCase):
         self.assertRaises(KeyError,
                           self.assemble, 'lda foo')
 
+    def test_assemble_tolerates_extra_whitespace(self):
+        self.assemble('   lda   #$00   ')  # should not raise
+
     def test_assemble_bad_number_raises_overflowerror(self):
         self.assertRaises(OverflowError,
                           self.assemble, 'lda #$fff')