Merge pull request #902 from reactormonk/float_toString

use `.f` instead of `.16e` for floats

lib/system/sysstr.nim

@@ -252,8 +252,10 @@ proc nimIntToStr(x: int): string {.compilerRtl.} =
 
 proc nimFloatToStr(x: float): string {.compilerproc.} =
   var buf: array [0..59, char]
-  c_sprintf(buf, "%#.16e", x)
-  return $buf
+  c_sprintf(buf, "%#.f", x)
+  result = $buf
+  if result[len(result)-1] == '.':
+    result.add("0")
 
 proc nimInt64ToStr(x: int64): string {.compilerRtl.} =
   result = newString(sizeof(x)*4)