bugfix: multiple yield statements and loop body vars

tests/accept/compile/toop.nim

@@ -0,0 +1,18 @@
+
+type
+  TA = object
+    x, y: int
+  
+  TB = object of TA
+    z: int
+    
+  TC = object of TB
+    whatever: string
+  
+proc p(a: var TA) = nil
+proc p(b: var TB) = nil
+
+var c: TC
+
+p(c)
+

tests/accept/compile/tquicksort.nim

@@ -9,7 +9,9 @@ proc QuickSort(list: seq[int]): seq[int] =
             left.add(list[i])
         elif list[i] > pivot:
             right.add(list[i])
-    result = QuickSort(left) & pivot & QuickSort(right)
+    result = QuickSort(left) & 
+      pivot & 
+      QuickSort(right)
     
 proc echoSeq(a: seq[int]) =
     for i in low(a)..high(a):

tests/accept/run/spec.csv

@@ -34,6 +34,7 @@ tisopr.nim;falsetrue
 titer2.nim;123
 titer3.nim;1231
 titer5.nim;abcxyz
+titer6.nim;000
 tlenopenarray.nim;1
 tlowhigh.nim;10
 tmatrix.nim;111

tests/accept/run/titer6.nim

@@ -0,0 +1,31 @@
+# Test iterator with more than 1 yield statement
+
+import strutils
+
+iterator tokenize2(s: string, seps: set[char] = Whitespace): tuple[
+  token: string, isSep: bool] =
+  var i = 0
+  while i < s.len:
+    var j = i
+    if s[j] in seps:
+      while j < s.len and s[j] in seps: inc(j)
+      if j > i:
+        yield (copy(s, i, j-1), true)
+    else:
+      while j < s.len and s[j] notin seps: inc(j)
+      if j > i:
+        yield (copy(s, i, j-1), false)
+    i = j
+
+for word, isSep in tokenize2("ta da", whiteSpace):
+  var titer2TestVar = 0 
+  stdout.write(titer2TestVar)
+
+proc wordWrap2(s: string, maxLineWidth = 80, 
+               splitLongWords = true,
+               seps: set[char] = whitespace,
+               newLine = "\n"): string  = 
+  result = ""
+  for word, isSep in tokenize2(s, seps):
+    var w = 0 
+