* make more standard libraries work with `nimPreviewSlimSystem`
* typo
* part two
* Delete specutils.nim
* fixes more tests
* more fixes
* fixes tests
* fixes three more tests
* add formatfloat import
* fix
* last
* Fixed missing newline after bound marker in mulipart post (#14794) and a problem where calling postContent with multipart data does not set content-length header.
* Update lib/pure/httpclient.nim
* Added comment outlining the reason for changes to httpclient.nim and added tests to ensure that multipart post has a newline at the end of the body, and that the content-length header is present.
* Fixed typo in comments.
* Removed redundant blank lines in thttpclient_standalone.nim.
Co-authored-by: Mark Pointing <mark@futurepoint.com.au>
Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
