replace backticks with POSIX $() (Closes: #577116)

And again thanks to Jari Aalto for spotting & patching!

debian/changelog

@@ -29,6 +29,7 @@ apt (0.7.26~exp4) experimental; urgency=low
       in the broken packages message. (Closes: #577168)
   * dselect/install:
     - modernize if-statements not to use 'x' (Closes: #577117)
+    - replace backticks with POSIX $() (Closes: #577116)
 
  -- David Kalnischkies <kalnischkies@gmail.com>  Sat, 03 Apr 2010 14:58:39 +0200
 

dselect/install

@@ -12,11 +12,11 @@ DPKG_OPTS="--admindir=$1"
 APT_OPT0="-oDir::State::status=$1/status"
 APT_OPT1="-oDPkg::Options::=$DPKG_OPTS"
 set -e
-RES=`apt-config shell CLEAN DSelect::Clean OPTS DSelect::Options \
+RES=$(apt-config shell CLEAN DSelect::Clean OPTS DSelect::Options \
                       DPKG Dir::Bin::dpkg/f APTGET Dir::Bin::apt-get/f \
 		      ARCHIVES Dir::Cache::Archives/d \
 		      WAIT DSelect::WaitAfterDownload/b \
-		      CHECKDIR DSelect::CheckDir/b`
+		      CHECKDIR DSelect::CheckDir/b)
 eval $RES
 set +e
 
@@ -64,12 +64,12 @@ fi
 # Finished OK
 if [ $RES -eq 0 ]; then
 
-   if [ `ls $ARCHIVES $ARCHIVES/partial | egrep -v "^lock$|^partial$" | wc -l` \
+   if [ $(ls $ARCHIVES $ARCHIVES/partial | egrep -v "^lock$|^partial$" | wc -l) \
         -eq 0 ]; then
       exit 0
    fi
 
-   NEWLS=`ls -ld $ARCHIVES`
+   NEWLS=$(ls -ld $ARCHIVES)
    if [ "$CHECKDIR" = "true" ]; then
       if [ "$OLDLS" = "$NEWLS" ]; then
          exit 0
@@ -77,7 +77,7 @@ if [ $RES -eq 0 ]; then
    fi
    
    # Check the cleaning mode
-   case `echo $CLEAN | tr '[:upper:]' '[:lower:]'` in
+   case $(echo $CLEAN | tr '[:upper:]' '[:lower:]') in
      auto)
        $APTGET "$APT_OPT0" "$APT_OPT1" autoclean &&
 	   echo $"Press enter to continue." && read RES && exit 0;
@@ -89,7 +89,7 @@ if [ $RES -eq 0 ]; then
      prompt)
        exec 3>&1
        echo -n $"Do you want to erase any previously downloaded .deb files?"
-       if [ `yesno "" y` = y ]; then
+       if [ $(yesno "" y) = y ]; then
           $APTGET "$APT_OPT0" "$APT_OPT1" clean &&
 	    echo $"Press enter to continue." && read RES && exit 0;
        fi