Prior to this change the exception on line 138 could not
be thrown, as far as I can tell. The reason for this
is that`HeaderPrefix` contained a trailing space, and we
had verified that `line` (trimmed) started with
`HeaderPrefix`. Hence `line` must contain something more
than `HeaderPrefix` otherwise the tailing space would
have been removed, so the length of `line` could not be
less than or equal to the length of `HeaderPrefix`.
Added and changed tests to ensure that both exceptions
regarding `FormatVersion` are thrown.
Fixes#5978
* WIP support solution folders for dotnet add and remove
* Add/remove solution folders based on directory hierarchy
* Fix tests
* Disable the solution building tests
* Address PR comments
* Fix a build break due to a new tool version used in the build
* Create SlnProjectExtensions and SlnProjectCollectionExtensions per PR comments
* WIP Improve sln migration tests
* Simple migration test
* Improve the test
* WIP update test assets
* Update test
* Test a bug fix
* Add another migrate sln test
* Fix FilePath related tests
* Finish the migrate sln tests
* Fix tests
* Fix another path issue
* Centralize Microsoft.Net.Sdk package version
Note: Templates were omitted as their version needs to be static.
* Unifying additional missmatched versions
* prefercliruntime
whitespace threw off ReplaceAll
* Additional missed globs
* Revert SDK version for performance tests
* PR Feedback
* Roll back VSTestXunitDesktopAndNetCore.csproj SDK version
* Snap of sln reader/writer from https://github.com/mono/monodevelop
* Remove unnecessary code
* Create a new test asset with an sln file because adding an sln to an existing one broke other tests
* Remove commented out line
* Removing unneeded PropertyGroup per PR comments
* Update the license
* Fixing the license
