patch 8.1.2275: using "seesion" looks like a mistake

Problem:    Using "seesion" looks like a mistake.
Solution:   Use an underscore to make the function sort first.

src/testdir/test_mksession.vim

@@ -9,6 +9,29 @@ CheckFeature mksession
 source shared.vim
 source term_util.vim
 
+" Test for storing global and local argument list in a session file
+" This one must be done first.
+func Test__mksession_arglocal()
+  enew | only
+  n a b c
+  new
+  arglocal
+  mksession! Xtest_mks.out
+
+  %bwipe!
+  %argdelete
+  argglobal
+  source Xtest_mks.out
+  call assert_equal(2, winnr('$'))
+  call assert_equal(2, arglistid(1))
+  call assert_equal(0, arglistid(2))
+
+  %bwipe!
+  %argdelete
+  argglobal
+  call delete('Xtest_mks.out')
+endfunc
+
 func Test_mksession()
   tabnew
   let wrap_save = &wrap
@@ -598,28 +621,6 @@ func Test_mksession_slash()
   set sessionoptions&
 endfunc
 
-" Test for storing global and local argument list in a session file
-func Test_mkseesion_arglocal()
-  enew | only
-  n a b c
-  new
-  arglocal
-  mksession! Xtest_mks.out
-
-  %bwipe!
-  %argdelete
-  argglobal
-  source Xtest_mks.out
-  call assert_equal(2, winnr('$'))
-  call assert_equal(2, arglistid(1))
-  call assert_equal(0, arglistid(2))
-
-  %bwipe!
-  %argdelete
-  argglobal
-  call delete('Xtest_mks.out')
-endfunc
-
 " Test for changing directory to the session file directory
 func Test_mksession_sesdir()
   call mkdir('Xproj')

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2275,
 /**/
     2274,
 /**/