Clear asciidoc-helper.sh syntax

Remove all unnecessary ";" characters at the end of several lines.
Align all indentations to 4 spaces.
Update console messages related to XML_CATALOG_FILES and
.bashrc file.

Signed-off-by: skaluzka <skaluzka@protonmail.com>

doc/asciidoc-helper.sh

@@ -9,7 +9,7 @@
 set -e
 
 if [ $# != 3 ]; then
-  exit 1;
+    exit 1
 fi
 
 output=$3
@@ -19,50 +19,49 @@ if [ "$1" = "html" ]; then
     base=${output%%.html.in}
 
     if [ "$2" != none ]; then
-      TZ=UTC "$2" -d manpage -o "$output" "$input";
+        TZ=UTC "$2" -d manpage -o "$output" "$input"
     else
-      echo "==================================";
-      echo;
-      echo "You need asciidoc installed to be able to build the manpage.";
-      echo "To build without manpages, use the --disable-asciidoc argument";
-      echo "when calling configure.";
-      echo;
-      echo "==================================";
-      exit 1;
+        echo "=================================="
+        echo
+        echo "You need asciidoc installed to be able to build the manpage."
+        echo "To build without manpages, use the --disable-asciidoc argument"
+        echo "when calling configure."
+        echo
+        echo "=================================="
+        exit 1
     fi
 elif [ "$1" = "man" ]; then
     input=${output%%.1.in}.1.txt
     base=${output%%.1.in}
 
     if test "$2" = none; then
-      echo "==================================";
-      echo;
-      echo "You need asciidoc installed to be able to build the manpage.";
-      echo "To build without manpages, use the --disable-asciidoc argument";
-      echo "when calling configure.";
-      echo;
-      echo "==================================";
-      exit 1;
+        echo "=================================="
+        echo
+        echo "You need asciidoc installed to be able to build the manpage."
+        echo "To build without manpages, use the --disable-asciidoc argument"
+        echo "when calling configure."
+        echo
+        echo "=================================="
+        exit 1
     fi
     if "$2" -f manpage "$input"; then
-      mv "$base.1" "$output";
+        mv "$base.1" "$output"
     else
-      cat<<EOF
+        cat<<EOF
 ==================================
 You need a working asciidoc installed to be able to build the manpage.
 
 a2x is installed, but for some reason it isn't working.  Sometimes
 this happens because required docbook support files are missing.
 Please install docbook-xsl, docbook-xml, and xmlto (Debian) or
-similar. If you use homebrew on Mac OS X, install the docbook formula
+similar.  If you use homebrew on Mac OS X, install the docbook formula
 and add "export XML_CATALOG_FILES=/usr/local/etc/xml/catalog" to your
-.bashrc
+.bashrc file.
 
 Alternatively, to build without manpages, use the --disable-asciidoc
 argument when calling configure.
 ==================================
 EOF
-      exit 1;
+        exit 1
     fi
 fi
-