This was formerly named 'eshell-command-result-p', but "result" isn't
quite the right terminology, since this function specifically tested
the output of a command, not its Lisp result (as
'eshell-command-result' would return).
* test/lisp/eshell/eshell-tests-helpers.el (eshell-insert-command):
Provide a more-complete docstring.
(eshell-match-result): Rename to...
(eshell-match-output): ... this.
(eshell-match-output--explainer): New function.
(eshell-command-result-p): Rename to...
(eshell-match-command-output): ... this.
* test/lisp/eshell/em-alias-tests.el
* test/lisp/eshell/em-dirs-tests.el
* test/lisp/eshell/em-extpipe-tests.el
* test/lisp/eshell/em-script-tests.el
* test/lisp/eshell/esh-cmd-tests.el
* test/lisp/eshell/esh-proc-tests.el
* test/lisp/eshell/esh-var-tests.el
* test/lisp/eshell/eshell-tests-helpers.el
* test/lisp/eshell/eshell-tests.el: Use 'eshell-match-command-output'.
* lisp/eshell/esh-io.el (eshell-close-target): Send EOF 3 times.
* test/lisp/eshell/em-extpipe-tests.el (em-extpipe-tests--deftest):
Re-enable these tests on EMBA.
This patch is adapted by one from Ken Brown, who uncovered the reason
for this bug (bug#56025).
Previously, concatenating a list to a string would first convert the
list to a string. Now, the string is concatenated with the last
element of the list.
* lisp/eshell/esh-util.el (eshell-to-flat-string): Make obsolete.
* lisp/eshell/esh-arg.el (eshell-concat, eshell-concat-1): New
functions.
(eshell-resolve-current-argument): Use 'eshell-concat'.
* test/lisp/eshell/esh-var-tests.el (esh-var-test/interp-concat-cmd):
Add check for concatenation of multiline output of subcommands.
(esh-var-test/quoted-interp-concat-cmd): New test.
* test/lisp/eshell/em-extpipe-tests.el (em-extpipe-test-13): Use
'eshell-concat'.
* doc/misc/eshell.texi (Expansion): Document this behavior.
* etc/NEWS: Announce the change (bug#55236).
* test/lisp/eshell/eshell-tests.el
* test/lisp/eshell/em-extpipe-tests.el: Load eshell-tests-helpers with
'require'.
* test/lisp/eshell/eshell-tests-helpers.el (eshell-history-file-name):
Define this here so individual test files don't have to.
* lisp/eshell/em-extpipe.el (eshell-parse-external-pipeline): Fix
misinterpreting sharp-quoted symbols as the beginning of single-quoted
strings (Bug#53518). Add protection against a possible infinite loop.
* test/lisp/eshell/em-extpipe-tests.el (em-extpipe-test-17): New
test (bug#53518).
