ash: add a testcase for bug 2281 (currently fails). Small code cleanups.

function                                             old     new   delta
changepath                                           195     192      -3
subevalvar                                          1204    1200      -4
readtoken1                                          3247    3240      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-14)             Total: -14 bytes

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

shell/ash_test/ash-vars/var_bash3.right

@@ -1,20 +1,20 @@
-a041#c
-a041#c
-a\041#c
-a\041#c
-a\041#c
-a\041#c
-a\041#c
-a\041#c
-a\041#c
-a\c
-a\c
-a\c
-a\\c
-a\\c
-a\\c
-a\tc
-a\tc
-a\tc
-atc
-a\tc
+1 a041#c
+2 a041#c
+3 a\041#c
+4 a\041#c
+5 a\041#c
+6 a\041#c
+7 a\041#c
+8 a\041#c
+9 a\041#c
+10 a\c
+11 a\c
+12 a\c
+13 a\\c
+14 a\\c
+15 a\\c
+16 a\tc
+17 a\tc
+18 a\tc
+19 atc
+20 a\tc

shell/ash_test/ash-vars/var_bash3.tests

@@ -1,41 +1,48 @@
 a='abc'
 r=${a//b/\041#}
-echo $r
-echo ${a//b/\041#}
-echo "${a//b/\041#}"
+echo 1 $r
+echo 2 ${a//b/\041#}
+echo 3 "${a//b/\041#}"
+# --- var_bash3.xx
+# +++ var_bash3.right
+# -1 a\041#c
+# +1 a041#c
+#  2 a041#c
+# -3 a041#c
+# +3 a\041#c
 
 a='abc'
 r=${a//b/\\041#}
-echo $r
-echo ${a//b/\\041#}
-echo "${a//b/\\041#}"
+echo 4 $r
+echo 5 ${a//b/\\041#}
+echo 6 "${a//b/\\041#}"
 
 a='abc'
 b='\041#'
 r=${a//b/$b}
-echo $r
-echo ${a//b/$b}
-echo "${a//b/$b}"
+echo 7 $r
+echo 8 ${a//b/$b}
+echo 9 "${a//b/$b}"
 
 a='abc'
 b='\'
 r="${a//b/$b}"
-echo $r
-echo ${a//b/$b}
-echo "${a//b/$b}"
+echo 10 $r
+echo 11 ${a//b/$b}
+echo 12 "${a//b/$b}"
 
 a='abc'
 b='\\'
 r="${a//b/$b}"
-echo $r
-echo ${a//b/$b}
-echo "${a//b/$b}"
+echo 13 $r
+echo 14 ${a//b/$b}
+echo 15 "${a//b/$b}"
 
 a='abc'
 b='\t'
 r="${a//b/$b}"
-echo $r
-echo ${a//b/$b}
-echo "${a//b/$b}"
-echo ${a//b/\t}
-echo "${a//b/\t}"
+echo 16 $r
+echo 17 ${a//b/$b}
+echo 18 "${a//b/$b}"
+echo 19 ${a//b/\t}
+echo 20 "${a//b/\t}"

shell/ash_test/ash-vars/var_bash4.right

@@ -0,0 +1,2 @@
+a*b-backslashstar-
+Done: 0

shell/ash_test/ash-vars/var_bash4.tests

@@ -0,0 +1,3 @@
+FOO='a*b\*c'
+echo "${FOO//\\*/-backslashstar-}"
+echo Done: $?