Clojure reader fixes (6 bugs), fixed with tests in realgenekim/dryer fork #14

Hi, Bob — kudos on all the great work here. I'm eager adopting this into my repos.

Funny, I created https://github.com/realgenekim/clj-surgeon, which required parsing Clojure, and ran into many of these same issues.

I'll have another PR coming in with some enhancements to compare methods inside defrecord, extend-protocol and the like, and to read syntax-quote gensyms (t0#). CRAP scores equal or higher than before. :)

Keep up the great work! (The rest written by Claude Code).

===

Six Clojure reader bugs on master, one commit each with a failing test, plus two follow-up commits that close gaps in items 4 and 6.

1. #_#_ a b c reads as b c. Clojure reads c.
2. #::alias{:a 1} reads as the symbol alias plus a map. Clojure reads one map.
3. (f #^String x) is a read error. #^ is the old spelling of ^.
4. #! hi mid-file takes ! as a tag that swallows the next form. Clojure reads #! as a line comment anywhere. A later commit ends that comment at \r as well as \n.
5. (clojure.core/ns demo) is compared as a candidate. Only a bare ns head was left out.
6. #'handle is a read error that drops the rest of the file. It now reads as (var handle). A later commit makes #' and #^ read past a discard: (#' #_x y) now reads ((var y)), as Clojure does.

Each new test fails on its commit's parent.

Every changed function has 100% coverage.

On a 126-file Clojure codebase, read warnings dropped from 15 to 4 and duplicate pairs rose from 65 to 76, because files that stopped at the first #' are now read in full.

Not included: Clojure rejects \a', and this reader accepts it. Known divergence, left as is: '#_ a b and @#_ a b read the quote or deref with no operand, where Clojure takes b. An existing test pins '#_x as (quote), so that's your call.

This is an offer, not a request. Take it, change it, or leave it.

Branch: realgenekim/dryer@master...clojure-reader-fixes (PRs here are limited to collaborators, so linking the branch instead.)