asciidoctor.adoc in asciidoctor-1.5.5

- old
+ new

@@ -1,10 +1,10 @@
 = asciidoctor(1)
 Dan Allen; Sarah White; Ryan Waldron
 :doctype: manpage
 :man manual: Asciidoctor Manual
-:man source: Asciidoctor 1.5.4
+:man source: Asciidoctor 1.5.5
 :page-layout: base
 
 == NAME
 
 asciidoctor - converts AsciiDoc source files to HTML, DocBook and other formats
@@ -141,9 +141,15 @@
 
 *-V, --version*::
   Print program version number.
 +
 `-v` can also be used if no other flags or arguments are present.
+
+== ENVIRONMENT
+
+*Asciidoctor* honors the SOURCE_DATE_EPOCH environment variable.
+If this variable is assigned an integer value, that value is used as the epoch of all input documents and as the local date and time.
+See https://reproducible-builds.org/specs/source-date-epoch/ for more information about this environment variable.
 
 == EXIT STATUS
 
 *0*::
   Success.