[elpa] externals/pulsar 67dc9a6193 1/2: Add README.md as it previews better on Git forges

[ELPA Syncer]

branch: externals/pulsar
commit 67dc9a619316171cc960213960e5e0bc57ed005d
Author: Protesilaos Stavrou <info@protesilaos.com>
Commit: Protesilaos Stavrou <info@protesilaos.com>

    Add README.md as it previews better on Git forges
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+# Pulsar
+
+This is a small Emacs package that temporarily highlights the current
+line after a given function is invoked. The affected functions are
+defined in the user option `pulsar-pulse-functions`. What Pulsar does
+is set up an advice so that those functions run a hook after they are
+called. The pulse effect is added there (`pulsar-after-function-hook`).
+
++ Package name (GNU ELPA): `pulsar`
++ Official manual: <https://protesilaos.com/emacs/pulsar>
++ Change log: <https://protesilaos.com/emacs/pulsar-changelog>
++ Git repositories:
+  + GitHub: <https://github.com/protesilaos/pulsar>
+  + GitLab: <https://gitlab.com/protesilaos/pulsar>
++ Backronym: Pulsar Unquestionably Luminates, Strictly Absent the Radiation.