patch 8.2.2522: Beancount filetype not recognized

Problem:    Beancount filetype not recognized.
Solution:   Add a detection rule. (Brian Ryall, closes #7859)

runtime/filetype.vim

@@ -216,6 +216,9 @@ au BufNewFile,BufRead *.bc			setf bc
 " BDF font
 au BufNewFile,BufRead *.bdf			setf bdf
 
+" Beancount
+au BufNewFile,BufRead *.beancount		setf beancount
+
 " BibTeX bibliography database file
 au BufNewFile,BufRead *.bib			setf bib
 

src/testdir/test_filetype.vim

@@ -79,6 +79,7 @@ let s:filename_checks = {
     \ 'bzl': ['file.bazel', 'file.bzl', 'WORKSPACE'],
     \ 'bc': ['file.bc'],
     \ 'bdf': ['file.bdf'],
+    \ 'beancount': ['file.beancount'],
     \ 'bib': ['file.bib'],
     \ 'bindzone': ['named.root', '/bind/db.file', '/named/db.file', 'any/bind/db.file', 'any/named/db.file'],
     \ 'blank': ['file.bl'],

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2522,
 /**/
     2521,
 /**/