replace unary < with pred and x .. <y with x ..< y for ranges (#35)

Author: hendrikgit

examples/odd_even.nim

@@ -14,5 +14,5 @@ import docopt
 let args = docopt(doc)
 echo args
 
-for i in 0 .. <args["ODD"].len:
+for i in 0 ..< args["ODD"].len:
     echo args["ODD"][i] & " " & args["EVEN"][i]

src/private/util.nim

@@ -38,7 +38,7 @@ proc partition*(s, sep: string): tuple[left, sep, right: string] =
     if pos < 0:
         (s, "", "")
     else:
-        (s.substr(0, <pos), s.substr(pos, <pos+sep.len), s.substr(pos+sep.len))
+        (s.substr(0, pos.pred), s.substr(pos, pos.pred+sep.len), s.substr(pos+sep.len))
 
 
 proc is_upper*(s: string): bool =