9718 update mandoc to 1.14.4

@@ -32,11 +32,11 @@
                    | "set" text text
                    | "undef" text
                    | "sqrt" box
                    | box pos box
                    | box mark
-                   | "matrix" "{" [col "{" list "}" ]*
+                   | "matrix" "{" [col "{" list "}"]* "}"
                    | pile "{" list "}"
                    | font box
                    | "size" text box
                    | "left" text eqn ["right" text]
            col     : "lcol" | "rcol" | "ccol" | "col"

@@ -292,6 +292,6 @@
      1989 by James Clark.  The eqn component of mandoc(1) was added in 2011.
 
 AUTHORS
      This eqn reference was written by Kristaps Dzonsons <kristaps@bsd.lv>.
 
-illumos                          July 20, 2017                         illumos
+illumos                        September 4, 2017                       illumos