Add language definition and samples for RUNOFF

Author: Alhadis

lib/linguist/languages.yml

@@ -3154,6 +3154,15 @@ RMarkdown:
   - .rmd
   tm_scope: source.gfm
 
+RUNOFF:
+  type: markup
+  color: "#665a4e"
+  extensions:
+  - .rnh
+  - .rno
+  tm_scope: text.runoff
+  ace_mode: text
+
 Racket:
   type: programming
   color: "#22228f"

samples/Groff/refs.rno

@@ -0,0 +1,35 @@
+.\" Copyright (c) 1980 Regents of the University of California.
+.\" All rights reserved.  The Berkeley software License Agreement
+.\" specifies the terms and conditions for redistribution.
+.\"
+.\"	@(#)refs.rno	6.1 (Berkeley) 4/29/86
+.\"
+.NS 1 "References"
+.sp
+.ip "[Bac78]"
+John Backus, \*(lqCan Programming Be Liberated from the von Neumann Style?
+A Functional Style and Its Algebra of Programs,\*(rq \fICACM\fP, Turing
+Award Lecture,  21, 8 (August 1978), 613-641.
+.sp 6p
+.ip "[Fod80]"
+John K. Foderaro, \*(lqThe \s-2FRANZ LISP\s+2
+Manual,\*(rq University of California,
+Berkeley, California, 1980.
+.sp 6p
+.ip "[Joy79]"
+W.N. Joy, O. Babaoglu, \*(lqUNIX Programmer's Manual,\*(rq November 7,
+1979, Computer Science Division, University of California, Berkeley,
+California.
+.sp 6p
+.ip "[Mc60]"
+J. McCarthy, \*(lqRecursive Functions of Symbolic expressions and their
+Computation by Machine,\*(rq Part I, \fICACM\fP 3, 4 (April 1960), 184-195.
+.sp 6p
+.ip "[Pat80]"
+Dorab Ratan Patel, \*(lqA System Organization for Applicative Programming,\*(rq
+M.S Thesis, University of California, Los Angeles, California, 1980.
+.sp 6p
+.ip "[Pat81]"
+Dorab Patel, \*(lqFunctional Language Interpreter User Manual,\*(rq
+University of California, Los Angeles, California, 1981.
+.bp