Small corrections when exporting environment variables

scripts/bin/export-env

@@ -1,12 +1,12 @@
 #!/usr/bin/awk -f
 
 BEGIN {
+	print("\n")
 	for (v in ENVIRON) {
-		if (v !~ /^(HOME|PWD|SHELL|USER|GROUP|UID|GID)$/) {
-			gsub(/[^0-9A-Za-z]/, "_", v)
-			gsub(/\n/, " ", ENVIRON[v])
+		if (v !~ /^(PWD|HOME|PATH|SHELL|HOSTNAME|UID|USER|GID|GROUP)$/) {
+			gsub(/[^0-9A-Za-z_]/, "_", v);
 			gsub(/'/, "'\\''", ENVIRON[v])
-			print "export '"v"="ENVIRON[v]"'"
+			print("export "v"='"ENVIRON[v]"'")
 		}
 	}
 }