Functions to print (nan,float)-to-string and and predicates are still
available, but ext:*-float-*-infinity aren't available if ECL is built
with option `--with-ieee-fp=no`.
New inline stable sort for vectors
This PR should improve on the current stable sorting of vectors, fixing issues such as #217 (bug) and #101 (performance).
Full disclosure: The merge sort algorithm was completely stolen from sbcl.
I'm sure the new version can be optimized, for example by inlining `stable-sort-merge-vectors`, and by treating simple-arrays differently.
But for now, it already has slightly better performance on the sequences that I tested with, for example running:
```common-lisp
(time (dotimes (x 50000)
(defparameter *my-arr*
(make-array 9 :initial-contents
(list
(cons 3 'a)
(cons 2 'b)
(cons 2 'c)
(cons 2 'd)
(cons 3 'e)
(cons 2 'f)
(cons 2 'g)
(cons 2 'h)
(cons 1 'i))))
(stable-sort *my-arr* #'< :key #'car)))
```
gave me 0.34 sec in the old version, and 0.28sec in the new one (even with the overhead of the make-array call, which is the same for both). But most importantly, the new version leaves the array sorted, which fixes bug #217:
```common-lisp
> *my-arr*
#A(T (9) ((1 . I) (2 . B) (2 . C) (2 . D) (2 . F) (2 . G) (2 . H) (3 . A) (3 . E)))
```
while in the old-version:
```common-lisp
> *my-arr*
#A(T (9) ((3 . A) (2 . B) (2 . C) (2 . D) (3 . E) (2 . F) (2 . G) (2 . H) (1 . I)))
```
The example in #217 also works now, of course:
```common-lisp
> (let ((a (copy-seq "BCA")))
(stable-sort a #'char<)
a)
"ABC"
```
See merge request !28
Fix profiler module
This handles Issue #163.
Removes the problematic list case, and ignores any argument that is not a symbol or string.
Example of new behaviour:
```common-lisp
> (profile:profile 'defined-function)
;;; Warning: ignoring invalid argument to PROFILE: 'DEFINED-FUNCTION
> (profile:profile undefined-function 'defined-function defined-function)
;;; Warning: ignoring undefined function UNDEFINED-FUNCTION
;;; Warning: ignoring invalid argument: 'DEFINED-FUNCTION
> (profile:profile) ; list profiled functions
(DEFINED-FUNCTION)
```
See merge request !26
fix minor typo in pprint error message
Minor fix to an error message I got when trying to change a read-only pprint dispatch table.
See merge request !25
