Merge branch 'lang' into 'master'

Generate lang.html with a template

See merge request graphviz/graphviz!1817

diff --cc doc/infosrc/Makefile
index cab642db7d043c95951624d9eddb06c732280517,b26ed11328bcf87dd725d68b52556293a353a78f..9ff42dc18e63f84f0302dcb41d9dfd8f55f2ecf1
--- 1/doc/infosrc/Makefile
--- 2/doc/infosrc/Makefile
+++ b/doc/infosrc/Makefile
@@@ -136,16 -145,12 +136,14 @@@ shapes : shapelist mkshapes.s
        ./mkshapes.sh
        touch shapes
   
 -shapes.html : shapes mkshhtml.py html.html record.gif record2.gif sdlshapes.png templates/shapes.html.j2 shapelist
 -      ./mkshhtml.py html.html < shapelist > shapes.html
 +shapes.html : shapes mkshhtml.py record.gif record2.gif sdlshapes.png templates/shapes.html.j2 shapelist html_grammar html1.gif html2.gif html3.gif html4.gif mklang
 +      ./mklang html_grammar gramtmp
 +      ./mkshhtml.py gramtmp html1.dot < shapelist > shapes.html
 +      rm gramtmp
  
- lang.html : grammar lang.1 lang.2 mklang
+ lang.html : grammar mklang mklang.py
        ./mklang grammar gramtmp
-       cat lang.1 > lang.html
-       cat gramtmp >> lang.html
-       cat lang.2 >> lang.html
+       ./mklang.py gramtmp > lang.html
        rm gramtmp
  
  arrows.html : arrow_grammar arrows.1 arrows.2 mkarrowtbl.sh mklang $(AGIF) $(A2GIF)