bug#55889: 29.0.50; Support mksh-specific function names in imenu

[Visuwesh]

Tags: patch

mksh supports characters well beyond [:alnum:_] in its function names.
More specifically, syn.c:function_body says the following

        /*-
         * Check for valid characters in name. POSIX and AT&T ksh93 say
         * only allow [a-zA-Z_0-9] but this allows more as old pdkshs
         * have allowed more; the following were never allowed:
         *      NUL TAB NL SP " $ & ' ( ) ; < = > \ ` |
         * C_QUOTE|C_SPC covers all but adds # * ? [ ]
         */

However, it seems like executing a function with a forward-slash (/)
character in it is impossible as well.

Attached patch adds a mksh-specific entry to sh-imenu-generic-expression
to do that.

0001-Support-mksh-specific-function-names-in-imenu.patch
Description: Text Data