Fix joaotavora#581: Reset output stream column when flushing listener…

… streams

Close joaotavora#583.

Streams, whether gray or not, have a so-called output-column or
line-column.  This change makes sure to reset it to 0 when the stream
is flushed, fixing the REPL problems described in joaotavora#581.

In slynk/slynk-gray.lisp a new generic RESET-STREAM-LINE-COLUMN is
added, with a method for SLY's gray stream couple class,
SLY-OUTPUT-STREAM, and a couple of extra methods for SBCL and CMUCL,
which aren't always using gray streams in the context where
stream-flushing is needed.

This allows us to call RESET-STREAM-LINE-COLUMN safely in
slynk/slynk.lisp's FLUSH-LISTENER-STREAMS (except for abcl, which has
some problem I didn't investigate).

* slynk/slynk-gray.lisp (reset-stream-line-column): New generic and
  methods.

* slynk/slynk.lisp (flush-listener-streams): Call
  reset-stream-line-column.

Commit-message-by: João Távora <[email protected]>

Close joaotavora#371: fix and detail documentation of sly-who-calls, etc

* sly.el (sly-who-calls): Mention `sly-list-callers' in the docstring.
(sly-calls-who): Mention `sly-list-callees' in the docstring.
(sly-list-callers): Mention `sly-who-calls' in the docstring.
(sly-list-callees): Mention `sly-calls-who' in the docstring.

* slynk/slynk-backend.lisp (calls-who): Fix docstring.

Release SLY 1.0.42

See NEWS.md for details.

* READNE.md: Update description.

* NEWS.md: release SLY 1.0.42.

* sly.el (Version): Bump to 1.0.42.  Update description.

* doc/sly.texi (SLYVER): 1.0.42.

abcl: fix inspector for a STRUCTURE-OBJECT with no inspectable parts

Unfortunately, not all system defined STRUCTURE-OBJECT instances
implement the getParts() protocol to expose their inspectable parts.
If this is the case, we now emit a message rather than bombing into an
error.

* slynk/backend/abcl.lisp: Rework it.

Cherry-picked-from: SLIME commit a4de28b
Co-authored-by: João Távora <[email protected]>

arglist-dispatch: better handling of closer-mop wrappers.

Display the arglist for the corresponding CL or SLYNK-MOP symbol.

* contrib/slynk-arglists.lisp (arglist-dispatch): Rework.

Co-authored-by: João Távora <[email protected]>
Cherry-pick-from: SLIME commit 5139e51

2.26.1

2.26

Release 2.25

2.24

2.23