This combines `defalias' and `make-obsolete'.
++++
+*** New macro `with-case-table'
+
+This executes the body with the case table temporarily set to a given
+case table.
+
+++
*** New function `unsafep' determines whether a Lisp form is safe.
for it. (If the coding system is detected incorrectly for a specific
file, you can put a `coding:' tags to override it.)
++++
+*** The new variable `ascii-case-table' stores the case table for the
+ascii character set. Language environments (such as Turkish) may
+alter the case correspondences of ASCII characters. This variable
+saves the original ASCII case table before any such changes.
+
---
*** The new function `merge-coding-systems' fills in unspecified aspects
of one coding system from another coding system.