diff --git a/jenkins-support b/jenkins-support
index 0e3ea92..1ee4a8c 100755
--- a/jenkins-support
+++ b/jenkins-support
@@ -2,35 +2,35 @@
 
 # compare if version1 < version2
 versionLT() {
-	local v1; v1=$(echo "$1" | cut -d '-' -f 1 )
-	local q1; q1=$(echo "$1" | cut -s -d '-' -f 2- )
-	local v2; v2=$(echo "$2" | cut -d '-' -f 1 )
-	local q2; q2=$(echo "$2" | cut -s -d '-' -f 2- )
-	if [ "$v1" = "$v2" ]; then
-		if [ "$q1" = "$q2" ]; then
-			return 1
-		else
-			if [ -z "$q1" ]; then
-				return 1
-			else
-				if [ -z "$q2" ]; then
-					return 0
-				else
-					[  "$q1" = "$(echo -e "$q1\n$q2" | sort -V | head -n1)" ]
-				fi
-			fi
-		fi
-	else
-		[  "$v1" = "$(echo -e "$v1\n$v2" | sort -V | head -n1)" ]
-	fi
+    local v1; v1=$(echo "$1" | cut -d '-' -f 1 )
+    local q1; q1=$(echo "$1" | cut -s -d '-' -f 2- )
+    local v2; v2=$(echo "$2" | cut -d '-' -f 1 )
+    local q2; q2=$(echo "$2" | cut -s -d '-' -f 2- )
+    if [ "$v1" = "$v2" ]; then
+        if [ "$q1" = "$q2" ]; then
+            return 1
+        else
+            if [ -z "$q1" ]; then
+                return 1
+            else
+                if [ -z "$q2" ]; then
+                    return 0
+                else
+                    [  "$q1" = "$(echo -e "$q1\n$q2" | sort -V | head -n1)" ]
+                fi
+            fi
+        fi
+    else
+        [  "$v1" = "$(echo -e "$v1\n$v2" | sort -V | head -n1)" ]
+    fi
 }
 
 # returns a plugin version from a plugin archive
 get_plugin_version() {
-	local archive; archive=$1
-	local version; version=$(unzip -p "$archive" META-INF/MANIFEST.MF | grep "^Plugin-Version: " | sed -e 's#^Plugin-Version: ##')
-	version=${version%%[[:space:]]}
-	echo "$version"
+    local archive; archive=$1
+    local version; version=$(unzip -p "$archive" META-INF/MANIFEST.MF | grep "^Plugin-Version: " | sed -e 's#^Plugin-Version: ##')
+    version=${version%%[[:space:]]}
+    echo "$version"
 }
 
 # Copy files from /usr/share/jenkins/ref into $JENKINS_HOME
@@ -38,21 +38,21 @@
 # Don't override, as this is just a reference setup, and use from UI
 # can then change this, upgrade plugins, etc.
 copy_reference_file() {
-	f="${1%/}"
-	b="${f%.override}"
-	rel="${b:23}"
-	version_marker="${rel}.version_from_image"
-	dir=$(dirname "${b}")
-	local action;
-	local reason;
-	local container_version;
-	local image_version;
-	local marker_version;
-	local log; log=false
-	if [[ ${rel} == plugins/*.jpi ]]; then
-	    container_version=$(get_plugin_version "$JENKINS_HOME/${rel}")
+    f="${1%/}"
+    b="${f%.override}"
+    rel="${b:23}"
+    version_marker="${rel}.version_from_image"
+    dir=$(dirname "${b}")
+    local action;
+    local reason;
+    local container_version;
+    local image_version;
+    local marker_version;
+    local log; log=false
+    if [[ ${rel} == plugins/*.jpi ]]; then
+        container_version=$(get_plugin_version "$JENKINS_HOME/${rel}")
         image_version=$(get_plugin_version "${f}")
-	    if [[ -e $JENKINS_HOME/${version_marker} ]]; then
+        if [[ -e $JENKINS_HOME/${version_marker} ]]; then
             marker_version=$(cat "$JENKINS_HOME/${version_marker}")
             if versionLT "$marker_version" "$container_version"; then
                 action="SKIPPED"
@@ -93,19 +93,19 @@
                     fi
                 fi
             fi
-		fi
+        fi
         if [[ ! -e $JENKINS_HOME/${rel} || "$action" == "UPGRADED" || $f = *.override ]]; then
             action=${action:-"INSTALLED"}
             log=true
             mkdir -p "$JENKINS_HOME/${dir:23}"
             cp -r "${f}" "$JENKINS_HOME/${rel}";
-		    # pin plugins on initial copy
-		    touch "$JENKINS_HOME/${rel}.pinned"
+            # pin plugins on initial copy
+            touch "$JENKINS_HOME/${rel}.pinned"
             echo "$image_version" > "$JENKINS_HOME/${version_marker}"
             reason=${reason:-$image_version}
         else
             action=${action:-"SKIPPED"}
-	    fi
+        fi
     else
         if [[ ! -e $JENKINS_HOME/${rel} || $f = *.override ]]
         then
@@ -116,12 +116,12 @@
         else
             action="SKIPPED"
         fi
-	fi
-	if [[ -n "$VERBOSE" || "$log" == "true" ]]; then
+    fi
+    if [[ -n "$VERBOSE" || "$log" == "true" ]]; then
         if [ -z "$reason" ]; then
             echo "$action $rel" >> "$COPY_REFERENCE_FILE_LOG"
         else
             echo "$action $rel : $reason" >> "$COPY_REFERENCE_FILE_LOG"
         fi
-	fi
+    fi
 }
\ No newline at end of file