hush: add recent ash tests to hush testsuite too (they all pass for hush)

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

shell/hush_test/hush-vars/var-do-not-collapse-arithmetic-expansion-at-parse-time.right

@@ -0,0 +1,2 @@
+12
+9

shell/hush_test/hush-vars/var-do-not-collapse-arithmetic-expansion-at-parse-time.tests

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+unset a
+echo $((3 + ${a:=$((4 + 5))}))
+echo $a

shell/hush_test/hush-vars/var-do-not-expand-tilde-in-parameter-expansion-in-quotes.right

@@ -0,0 +1 @@
+~root

shell/hush_test/hush-vars/var-do-not-expand-tilde-in-parameter-expansion-in-quotes.tests

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+unset a
+echo "${a:-~root}"

shell/hush_test/hush-vars/var-do-not-quote-backslashes-in-parameter-expansions-outside-quotes.right

@@ -0,0 +1 @@
+/b/c/

shell/hush_test/hush-vars/var-do-not-quote-backslashes-in-parameter-expansions-outside-quotes.tests

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+a=/b/c/*
+b=\\
+echo ${a%$b*}

shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-1.right

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+a_\_z_c

shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-1.tests

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+v="a\bc"
+echo ${v/\\b/_\\_\z_}

shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-2.right

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+ax/yc

shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-2.tests

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+v="abc"
+echo ${v/b/x/y}

shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-3.right

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+axcabc

shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-3.tests

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+v="abcabc"
+echo ${v/b/x}

shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-4.right

@@ -0,0 +1 @@
+axcaxc

shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-4.tests

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+v="abcabc"
+echo ${v//b/x}

shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-5.right

@@ -0,0 +1 @@
+axc

shell/hush_test/hush-vars/var-pattern-replacement-in-parameter-expansion-5.tests

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+v="ab/c"
+echo ${v/b\//x}

shell/hush_test/hush-vars/var-runtime-quote-detection.right

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+<>

shell/hush_test/hush-vars/var-runtime-quote-detection.tests

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+foo=\\ echo "<${foo#[\\]}>"