Merge branch 'zb/userdiff-fountain'

New userdiff pattern definition for fountain screenwriting markup
format.

* zb/userdiff-fountain:
  userdiff: add support for Fountain documents

Documentation/gitattributes.txt

@@ -527,6 +527,8 @@ patterns are available:
 
 - `fortran` suitable for source code in the Fortran language.
 
+- `fountain` suitable for Fountain documents.
+
 - `html` suitable for HTML/XHTML documents.
 
 - `java` suitable for source code in the Java language.

t/t4018-diff-funcname.sh

@@ -31,6 +31,7 @@ diffpatterns="
 	cpp
 	csharp
 	fortran
+	fountain
 	html
 	java
 	matlab

t/t4018/fountain-scene

@@ -0,0 +1,4 @@
+EXT. STREET RIGHT OUTSIDE - DAY
+
+CHARACTER
+You didn't say the magic phrase, "ChangeMe".

userdiff.c

@@ -35,6 +35,8 @@ IPATTERN("fortran",
 	  * they would have been matched above as a variable anyway. */
 	 "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
 	 "|//|\\*\\*|::|[/<>=]="),
+IPATTERN("fountain", "^((\\.[^.]|(int|ext|est|int\\.?/ext|i/e)[. ]).*)$",
+	 "[^ \t-]+"),
 PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$",
 	 "[^<>= \t]+"),
 PATTERNS("java",