[Fix #57] Add inf-clojure-meta

[charignon]

Summary

This commit addresses
#57 (Add an interactive
command to display a var's metadata) by adding an interactive command inf-clojure-meta to show metadata of a form at point.

This command works with clojure, lumo and planck alike.

Test Plan

Manually tested the command through inf-clojure using clojure, lumo and planck. I put my cursor on a
form and ran it interactively, it displayed the metadata in the inf buffer.
Specifically I tested with (with-meta [1 2 3] {:data "hello"}) which printed {:data "hello"} in the inf-clojure buffer.

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• The commits are consistent with our [contribution guidelines][1]
• The new code is not generating bytecode or M-x checkdoc warnings
• You've updated the changelog (if adding/changing user-visible functionality)
• [NO] You've updated the readme (if adding/changing user-visible functionality)
  • It seems that we generally document higher level features and this does not warrant a change to the readme, let me know if you think that's necessary.

[charignon]

Could you suggest an example of syntax quirk that you think would be problematic? @arichiardi

[arichiardi]

I might need to think about this through and see what other functions are doing, sorry, maybe it is actually already alright

[arichiardi]

@charignon sorry for the delay, let me try this PR.

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💻
...

So I tried the branch, but I fail to see how it is going to work at the moment. I was expecting so do something like:

(require '[clojure.string :as string])

cljs.user=> |clojure.string/blank?

and see the meta but that did not happen because we are missing the var around the meta call like (meta (var clojure.string/blank?))

I feel I am misunderstanding the use case you want to address here (in which case, my fault 😄)

[bbatsov]

This hasn't had any activity in years, so I'll close it.