fix typo, minor optimisation, identation fix

modules/upgrade_dist.sh

@@ -15,7 +15,7 @@
 #   * PROXY_SRV_PORT: Working port for general purpose proxy if one declared
 # ------------------------------------------------------------------------------
 
-export VER_upgrade_dist="0.2.4"
+export VER_upgrade_dist="0.2.5"
 
 # As aptitude might fail if clock is too far from real time, we need to depend
 # on ntp
@@ -39,16 +39,16 @@ upgrade_dist()
     prnt I "Configuring proxy for APT..."
     if [[ -n $PROXY_APT ]]; then
         if [[ ! -d $(dirname $proxyfile) ]]; then
-	    mkdir -pv $(dirname $proxyfile) || (
+            mkdir -pv "$(dirname $proxyfile)" || (
                 prnt E "Impossible to create directory to receive APT configuration."
                 die 60
             )
         else
             # Cleanup
             if [[ -s $proxyfile ]]; then
-                emptyflie $proxyfile
+                emptyfile $proxyfile
             fi
-            if [[ $(grep "^Acquire::http::Proxy" /etc/apt/apt.conf) ]]; then
+            if grep -q "^Acquire::http::Proxy" /etc/apt/apt.conf; then
                 sed -i -e "/^Acquire::http::Proxy/d" /etc/apt/apt.conf
             fi
         fi