Calc parses fractions written using U+2044 FRACTION SLASH

Fractions of the form 123⁄456 are handled as if written 123:456. Note
in particular the difference in behavior from U+2215 DIVISION SLASH
and U+002F SOLIDUS, which result in division rather than a rational
fraction.
* lisp/calc/calc-aent.el (math-read-replacement-list): Substitute a
colon for any fraction slash.  (Bug#66944)

* test/lisp/calc/calc-tests.el (calc-frac-input): Test various
fraction types.

* etc/NEWS:
* doc/misc/calc.texi (Fractions): Mention fraction slash, precomposed
fractions.

Copyright-paperwork-exempt: yes

1 files changed, 16 insertions, 0 deletions

diff --git a/doc/misc/calc.texi b/doc/misc/calc.texi
index 7ae338307a5..31db77a0720 100644
--- a/doc/misc/calc.texi
+++ b/doc/misc/calc.texi
@@ -10571,6 +10571,22 @@ Non-decimal fractions are entered and displayed as
 @samp{@var{radix}#@var{num}:@var{denom}} (or in the analogous three-part
 form).  The numerator and denominator always use the same radix.
 
+@ifnottex
+Fractions may also be entered with @kbd{@U{2044}} (U+2044 FRACTION
+SLASH) in place of any @kbd{:}.  Precomposed fraction characters from
+@kbd{@U{00BD}} (U+00BD VULGAR FRACTION ONE HALF) through
+@kbd{@U{215E}} (U+215E VULGAR FRACTION SEVEN EIGHTHS) as supported as
+well.  Thus @samp{2:3}, @samp{2@U{2044}3}, and @samp{@U{2154}} are all
+equivalent.
+@end ifnottex
+@iftex
+Fractions may also be entered with U+2044 FRACTION SLASH in place of
+any @kbd{:}.  Precomposed fraction characters from U+00BD VULGAR
+FRACTION ONE HALF through U+215E VULGAR FRACTION SEVEN EIGHTHS as
+supported as well.
+@end iftex
+
+
 @node Floats
 @section Floats