Fix multiline read of mixed statements (%XXX*% followed by DNN*)

We now check if there is a %XXX*% command inside the line before
considering it a multiline statement.

gerber/rs274x.py

@@ -241,10 +241,11 @@ class GerberParser(object):
                 continue
 
             # deal with multi-line parameters
-            if line.startswith("%") and not line.endswith("%"):
+            if line.startswith("%") and not line.endswith("%") and not "%" in line[1:]:
                 oldline = line
                 continue
 
+
             did_something = True  # make sure we do at least one loop
             while did_something and len(line) > 0:
                 did_something = False
@@ -292,6 +293,7 @@ class GerberParser(object):
 
                 # parameter
                 (param, r) = _match_one_from_many(self.PARAM_STMT, line)
+
                 if param:
                     if param["param"] == "FS":
                         stmt = FSParamStmt.from_dict(param)

gerber/tests/resources/multiline_read.ger

@@ -0,0 +1,9 @@
+G75*
+G71*
+%OFA0B0*%
+%FSLAX23Y23*%
+%IPPOS*%
+%LPD*%
+%ADD10C,0.1*%
+%LPD*%D10*
+M02*

gerber/tests/test_rs274x.py

@@ -11,11 +11,19 @@ from .tests import *
 TOP_COPPER_FILE = os.path.join(os.path.dirname(__file__),
                                 'resources/top_copper.GTL')
 
+MULTILINE_READ_FILE = os.path.join(os.path.dirname(__file__),
+                                'resources/multiline_read.ger')
+
 
 def test_read():
     top_copper = read(TOP_COPPER_FILE)
     assert(isinstance(top_copper, GerberFile))
 
+def test_multiline_read():
+    multiline = read(MULTILINE_READ_FILE)
+    assert(isinstance(multiline, GerberFile))
+    assert_equal(10, len(multiline.statements))
+
 def test_comments_parameter():
     top_copper = read(TOP_COPPER_FILE)
     assert_equal(top_copper.comments[0], 'This is a comment,:')