Fix 80 typos in comments

(cherry picked from commit 7dca902a85dc02e5df66f0f45a00d1575e7a0220)

src/cmd/ksh93/tests/comvar.sh

@@ -407,7 +407,7 @@ got=$r
 	err_exit "compound indexed array pretty print failed -- expected $exp, got $got"
 }
 
-# array of compund variables
+# array of compound variables
 typeset -C data=(
         typeset -a samples
 )

src/cmd/ksh93/tests/locale.sh

@@ -291,7 +291,7 @@ LC_ALL=C
 x=$"hello"
 [[ $x == hello ]] || err_exit 'assignment of message strings not working'
 
-# tests for multibyte characteer at buffer boundary
+# tests for multibyte character at buffer boundary
 {
 	print 'cat << \\EOF'
 	for ((i=1; i < 164; i++))

src/cmd/ksh93/tests/nameref.sh

@@ -417,14 +417,14 @@ fun3
 
 typeset -A x=( [a]=1 ) 
 nameref c=x[h]
-[[ -v x[h] ]] && err_exit 'creating reference to non-existant associative array element causes element to get added'
+[[ -v x[h] ]] && err_exit 'creating reference to non-existent associative array element causes element to get added'
 
 unset a
 function x
 {
 	nameref a=a
 	(( $# > 0 )) && typeset -A a
-	a[a b]=${1-99}  # this was cauing a syntax on the second call
+	a[a b]=${1-99}  # this was causing a syntax on the second call
 }
 x 7
 x 2> /dev/null