update-package trying to use packageid,version instead of package.version

[myusrn]

i'm running the current vs15upd2 nuget package manager extension 3.4.3.855 and am finding that attempts to use package manager console update-package command results in it trying to execute update with a ',' in the fully qualified package name instead of a '.' and so the update fails.

repo steps
PM>update-package My.Package.Id -source d:\src\temp\packages -includeprerelease -version 0.0.0-alpha-1

expected
that it looks for fully qualified package name "My.Pacakage.Id.0.0.0-alpha-1.nupkg" in specified source

actual
it looks for fully qualified package name "My.Pacakage.Id,0.0.0-alpha-1.nupkg" in specified source, i.e. it inserts a comma between packageid and version instead of a period

workarounds
haven't found one yet

[jainaashish]

There is a ',' only in error message while for actual call, we use '.' I'll add space in error message to avoid confusion.

Other than this, i'm not able to repro this issue. Please share a small repro project.

[jainaashish]

opened another issue to have consistency with or without -Version parameter (#2807). And as part of this issue, I'll fix error message confusion.