extend assoc_expand_once to indexed arrays; rename to array_expand_once, keeping old name as a synonym; udpate shopt documentation

doc/bashref.log

@@ -1,11 +1,12 @@
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+This is pdfTeX, Version 3.141592653-2.6-1.40.22 (TeX Live 2021/MacPorts 2021.58693_0) (preloaded format=etex 2021.8.30)  13 JUN 2023 10:42
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-(/usr/local/src/bash/bash-20230522/doc/bashref.texi
-(/usr/local/src/bash/bash-20230522/doc/texinfo.tex
+**\nonstopmode \input /usr/local/src/bash/bash-20230612/doc/bashref.texi \input
+ /usr/local/src/bash/bash-20230612/doc/bashref.texi
+(/usr/local/src/bash/bash-20230612/doc/bashref.texi
+(/usr/local/src/bash/bash-20230612/doc/texinfo.tex
 Loading texinfo [version 2015-11-22.14]:
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@@ -161,23 +162,20 @@ This is `epsf.tex' v2.7.4 <14 February 2011>
 texinfo.tex: doing @include of version.texi
 
 
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-(/usr/local/build/bash/bash-20230522/doc/bashref.toc [-1] [-2] [-3]) [-4]
-(/usr/local/build/bash/bash-20230522/doc/bashref.toc)
-(/usr/local/build/bash/bash-20230522/doc/bashref.toc) Chapter 1
+(/usr/local/src/bash/bash-20230612/doc/version.texi) [1] [2]
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+Chapter 1
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+ Chapter 2
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- (/usr/local/src/bash/bash-20230522/lib/readline/doc/rluser.texi
+ (/usr/local/src/bash/bash-20230612/lib/readline/doc/rluser.texi
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@@ -311,10 +309,10 @@ gnored[]
 texinfo.tex: doing @include of hsuser.texi
 
 
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+(/usr/local/src/bash/bash-20230612/lib/readline/doc/hsuser.texi Chapter 9
 [155] [156] [157] [158] [159] [160]) Chapter 10 [161] [162] [163] [164]
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+Underfull \hbox (badness 10000) in paragraph at lines 9642--9651
 []@textrm All of the fol-low-ing op-tions ex-cept for `@texttt alt-array-implem
 entation[]@textrm '[],
 
@@ -327,7 +325,7 @@ entation[]@textrm '[],
 .etc.
 
 
-Underfull \hbox (badness 10000) in paragraph at lines 9638--9647
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@@ -343,38 +341,16 @@ extrm '[], `@texttt strict-posix-default[]@textrm '[], and
 [175] [176] Appendix C [177]
 texinfo.tex: doing @include of fdl.texi
 
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+Output written on bashref.dvi (200 pages, 840512 bytes).