tracks/nim/exercises/word-count/example.nim in trackler-2.2.1.132 vs tracks/nim/exercises/word-count/example.nim in trackler-2.2.1.133

@@ -4,14 +4,16 @@
 type TWordCount* = CritBitTree[int]
   ## A mapping from strings (`words`) to ints (`counts`).
 
 iterator words(s: string): string =
   for word in s.split(AllChars - Letters - Digits - {'\0'}):
-    yield toLower(word)
+    yield toLowerAscii(word)
 
 proc wordCount*(s: string): TWordCount {.noSideEffect.} =
   ## Returns a mapping from the words (alphanumeric sequences) in `s` to their
   ## respective counts.
   for word in words(s):
+    if word.len == 0:
+      continue
     if not result.hasKey(word):
       result[word] = 0
     result[word] = result[word] + 1