README.adoc in metanorma-0.2.6 vs README.adoc in metanorma-0.2.7

@@ -55,11 +55,11 @@
 https://github.com/riboseinc/metanorma-macos-setup
 
 This is a one-stop installation script that setups Ruby, Node
 and all necessary parts for running Metanorma.
 
-=== Installation, https://www.ubuntu.com[Ubunto]
+=== Installation, https://www.ubuntu.com[Ubuntu]
 
 [source,sh]
 ----
 # Set up prerequisites
 apt-get update
@@ -111,22 +111,23 @@
 
 [source,sh]
 ----
 $ metanorma -h
 Usage: metanorma [options] <file>
-  -t, --type TYPE                  Type of standard to generate: rfc2, rfc3, iso, gb, csd, csand, m3d
-  -x, --extensions EXT1,EXT2,...   Type of extension to generate per type:
+  -t, --type TYPE                       Type of standard to generate: rfc2, rfc3, iso, gb, csd, csand, m3d
+  -x, --extensions EXT1,EXT2,... | all  Type of extension to generate per type:
   {
     :rfc2=>{:xmlrfc=>"v2.xml"},
     :rfc3=>{:xmlrfc=>"v3.xml"},
     :iso=>{:html=>"html", :html_alt=>"alt.html", :doc=>"doc"},
     :gb=>{:html=>"html", :doc=>"doc"},
     :csd=>{:html=>"html", :pdf=>"pdf"},
     :csand=>{:html=>"html"},
     :m3d=>{:html=>"html", :doc=>"doc"},
     :rsd=>{:html=>"html"}
   }
-  In addition, xml (outside of rfc2, rfc3) generates IsoDoc XML
+  In addition, xml (outside of rfc2, rfc3) generates IsoDoc XML. If the argument is "all" or the option is
+  missing, all available extensions are generated.
   -f, --format FORMAT              Format of source file: asciidoc (current default, only format supported)
   -r, --require LIBRARY            Require LIBRARY prior to execution
   -h, --help                       Show this message
 ----