Merge pull request #3126 from Alhadis/roff

Improve Roff support / Add RUNOFF to recognised languages

lib/linguist/heuristics.rb

@@ -359,6 +359,14 @@ module Linguist
       end
     end
 
+    disambiguate ".rno" do |data|
+      if /^\.!|^\.end lit(?:eral)?\b/i.match(data)
+        Language["RUNOFF"]
+      elsif /^\.\\" /.match(data)
+        Language["Groff"]
+      end
+    end
+
     disambiguate ".rpy" do |data|
       if /(^(import|from|class|def)\s)/m.match(data)
         Language["Python"]

lib/linguist/languages.yml

@@ -1411,9 +1411,14 @@ Groff:
   - .n
   - .rno
   - .roff
-  tm_scope: text.groff
+  - .tmac
+  filenames:
+  - mmn
+  - mmt
+  tm_scope: text.roff
   aliases:
   - nroff
+  - troff
   ace_mode: text
 
 Groovy:
@@ -3171,6 +3176,15 @@ 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"