strformat: doc example fails

[pb-cdunn]

This comes from straight from the docs for strformat:

• https://nim-lang.org/docs/strformat.html

doAssert fmt"{123.456:>9.0f}" == " 123."

Example

import strformat

proc main() =
    doAssert fmt"{123.456:>9.0f}" == "     123."
main()

Current Output

Error: unhandled exception: foo.nim(4, 14) `fmt"{123.456:>9.0f}" == "     123."`  [AssertionError]

Expected Output

It should pass.

How I found this:

    stats.to_table(st) was Assembly statistics
       120  sum
         40 mean
        40  median
...
    expected_table was Assembly statistics
       120  sum
        40. mean
...

proc to_table*(st: Stats): string =
    result = strformat.fmt"""Assembly statistics
{st.sum:>10}  sum
{math.round(st.mean):>11.0f} mean
{st.median:>10}  median
...

Possible Solution

Not sure, but this came up before:

• strformat float printing doesn't print ".0" portion [regression] #11089

Additional Information

• It was working in version 1.0.0, and earlier.

$ nim -v
Nim Compiler Version 1.2.0 [Linux: amd64]
Compiled at 2020-04-03
Copyright (c) 2006-2020 by Andreas Rumpf

active boot switches: -d:release

[pb-cdunn]

Btw, I don't have an opinion on whether the dot should be there. Updating the docs would be fine with me. But if you want to maintain backward compatibility, maybe we need a different character to match Python/JS behavior. Maybe a ! instead of ..