maketgz: delete .bak files, fix indentation

Ref: https://github.com/curl/curl/pull/2660

Closes https://github.com/curl/curl/pull/2662

maketgz

@@ -9,7 +9,7 @@
 #                            | (__| |_| |  _ <| |___
 #                             \___|\___/|_| \_\_____|
 #
-# Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
 #
 # This software is licensed as described in the file COPYING, which
 # you should have received as part of this distribution. The terms
@@ -78,19 +78,23 @@ fi
 datestamp=`date +"%F"`
 
 # Replace version number in header file:
-sed -i.bak -e 's/^#define LIBCURL_VERSION .*/#define LIBCURL_VERSION "'$libversion'"/g' \
+sed -i.bak \
+    -e 's/^#define LIBCURL_VERSION .*/#define LIBCURL_VERSION "'$libversion'"/g' \
     -e 's/^#define LIBCURL_VERSION_NUM .*/#define LIBCURL_VERSION_NUM 0x'$numeric'/g' \
     -e 's/^#define LIBCURL_VERSION_MAJOR .*/#define LIBCURL_VERSION_MAJOR '$major'/g' \
     -e 's/^#define LIBCURL_VERSION_MINOR .*/#define LIBCURL_VERSION_MINOR '$minor'/g' \
     -e 's/^#define LIBCURL_VERSION_PATCH .*/#define LIBCURL_VERSION_PATCH '$patch'/g' \
     -e "s/^#define LIBCURL_TIMESTAMP .*/#define LIBCURL_TIMESTAMP \"$datestamp\"/g" \
     $HEADER
+rm -f "$HEADER.bak"
 
 # Replace version number in header file:
 sed -i.bak 's/#define CURL_VERSION .*/#define CURL_VERSION "'$curlversion'"/g' $CHEADER
+rm -f "$CHEADER.bak"
 
 # Replace version number in plist file:
 sed -i.bak "s/7\.12\.3/$libversion/g" $PLIST
+rm -f "$PLIST.bak"
 
 if test -n "$only"; then
   # done!
@@ -102,8 +106,7 @@ echo "libcurl version $libversion"
 echo "libcurl numerical $numeric"
 echo "datestamp $datestamp"
 
-findprog()
-{
+findprog() {
   file="$1"
   for part in `echo $PATH| tr ':' ' '`; do
     path="$part/$file"
@@ -189,8 +192,7 @@ gzip -dc $targz | xz -6e - > $xz
 #
 # Now make a zip archive from the tar.gz original
 #
-makezip ()
-{
+makezip() {
   rm -rf $tempdir
   mkdir $tempdir
   cd $tempdir