What version of Go are you using (go version)?

$ go version
go version go1.19.3 darwin/arm64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

$ go env
GO111MODULE=""
GOARCH="arm64"
GOBIN=""
GOCACHE="/Users/tuckerman/Library/Caches/go-build"
GOENV="/Users/tuckerman/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="arm64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/tuckerman/dev/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/tuckerman/dev"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/opt/homebrew/Cellar/go/1.19.3/libexec"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/opt/homebrew/Cellar/go/1.19.3/libexec/pkg/tool/darwin_arm64"
GOVCS=""
GOVERSION="go1.19.3"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/dev/null"
GOWORK=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/wk/hh1ylh7j72j18222jytym8lm0000gn/T/go-build90477944=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

Created a slide file, e.g.

# Example Title

Cameron Tuckerman-Lee
Bug Reporter
@tuckerman@hachyderm.io

## Foo
Bar
...

and ran present

What did you expect to see?

Ideally, the author details page would make "@tuckerman@hachyderm.io" a hyperlink to https://hachyderm.io/@tuckerman or not hyperlinked at all.

What did you see instead?

It links to http://twitter.com/tuckerman@hachyderm.io

Thoughts

Technically converting @foo@example.com into a URI requires a WebFinger lookup but, in the spirit of keeping the present tool simple, it seems reasonable to a) check strings.Contains(text[1:], "@") and just not hyperlink it to Twitter or b) make the same check, split on the second "@" and hyperlink it to "https://"+components[1]+"/@"+components[0].

I'd personally find the latter convenient as it seems the ability to host an activitypub server on a different domain than the one in the handle using WebFinger isn't very popular. I can understand not wanting to do something technically incorrect in an official package, in which case I'd still prefer not auto-hyperlinking to Twitter (I think doing any WebFinger lookups is far beyond the expected scope of present).

I have changes for either option locally if folks would be open to making this change.