patch 8.2.1128: the write message mentions characters, but it's bytes

Problem:    The write message mentions characters, but it's actually bytes.
Solution:   Change "C" to "B" and "characters" to "bytes".

runtime/doc/options.txt

@@ -6730,7 +6730,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 	 flag	meaning when present	~
 	  f	use "(3 of 5)" instead of "(file 3 of 5)"
 	  i	use "[noeol]" instead of "[Incomplete last line]"
-	  l	use "999L, 888C" instead of "999 lines, 888 characters"
+	  l	use "999L, 888B" instead of "999 lines, 888 bytes"
 	  m	use "[+]" instead of "[Modified]"
 	  n	use "[New]" instead of "[New File]"
 	  r	use "[RO]" instead of "[readonly]"

src/fileio.c

@@ -3039,13 +3039,13 @@ msg_add_lines(
 	*p++ = ' ';
     if (shortmess(SHM_LINES))
 	vim_snprintf((char *)p, IOSIZE - (p - IObuff),
-		"%ldL, %lldC", lnum, (varnumber_T)nchars);
+		"%ldL, %lldB", lnum, (varnumber_T)nchars);
     else
     {
 	sprintf((char *)p, NGETTEXT("%ld line, ", "%ld lines, ", lnum), lnum);
 	p += STRLEN(p);
 	vim_snprintf((char *)p, IOSIZE - (p - IObuff),
-		NGETTEXT("%lld character", "%lld characters", nchars),
+		NGETTEXT("%lld byte", "%lld bytes", nchars),
 		(varnumber_T)nchars);
     }
 }

src/testdir/dumps/Test_diff_syntax_1.dump

@@ -17,4 +17,4 @@
 |~| @73
 |~| @73
 |X+1#0000000&|p|r|o|g|r|a|m|1|.|c| @45|1|,|1| @11|A|l@1
-|"+0&&|X|p|r|o|g|r|a|m|2|.|c|"| |5|L|,| |7|6|C| @53
+|"+0&&|X|p|r|o|g|r|a|m|2|.|c|"| |5|L|,| |7|6|B| @53

src/testdir/dumps/Test_display_unprintable_01.dump

@@ -6,4 +6,4 @@
 |t|w|o| @46
 |~+0#4040ff13&| @48
 |X+1#0000000&|u|n|i|x|.|t|x|t| @22|1|,|1| @11|A|l@1
-|"+0&&|X|m|a|c|.|t|x|t|"| |[|n|o|e|o|l|]|[|m|a|c|]| |2|L|,| |9|C| @19
+|"+0&&|X|m|a|c|.|t|x|t|"| |[|n|o|e|o|l|]|[|m|a|c|]| |2|L|,| |9|B| @19

src/testdir/dumps/Test_long_file_name_1.dump

@@ -5,4 +5,4 @@
 |~| @73
 |~| @73
 |~| @73
-|<+0#0000000&|x@64|"| |0|L|,| |0|C| 
+|<+0#0000000&|x@64|"| |0|L|,| |0|B| 

src/testdir/dumps/Test_tselect_1.dump

@@ -7,4 +7,4 @@
 |~| @48
 |~| @48
 |~| @48
-|"+0#0000000&|X|t|e|s|t|.|c|"| |2|L|,| |2|3|C| @14|1|,|1| @10|A|l@1| 
+|"+0#0000000&|X|t|e|s|t|.|c|"| |2|L|,| |2|3|B| @14|1|,|1| @10|A|l@1| 

src/testdir/test_cscope.vim

@@ -103,7 +103,7 @@ func Test_cscopeWithCscopeConnections()
     for cmd in ['cs find f Xmemfile_test.c', 'cs find 7 Xmemfile_test.c']
       enew
       let a = execute(cmd)
-      call assert_true(a =~ '"Xmemfile_test.c" \d\+L, \d\+C')
+      call assert_true(a =~ '"Xmemfile_test.c" \d\+L, \d\+B')
       call assert_equal('Xmemfile_test.c', @%)
     endfor
 
@@ -113,7 +113,7 @@ func Test_cscopeWithCscopeConnections()
       let a = execute(cmd)
       let alines = split(a, '\n', 1)
       call assert_equal('', alines[0])
-      call assert_true(alines[1] =~ '"Xmemfile_test.c" \d\+L, \d\+C')
+      call assert_true(alines[1] =~ '"Xmemfile_test.c" \d\+L, \d\+B')
       call assert_equal('(1 of 1): <<global>> #include <assert.h>', alines[2])
       call assert_equal('#include <assert.h>', getline('.'))
     endfor

src/testdir/test_netbeans.vim

@@ -501,7 +501,7 @@ func Nb_basic(port)
   let l = readfile('Xnetbeans')
   call assert_equal('send: 3:insertDone!78 T F', l[-1])
   sleep 1m
-  call assert_match('.*/Xfile4" 3L, 0C', v:statusmsg)
+  call assert_match('.*/Xfile4" 3L, 0B', v:statusmsg)
   let g:last += 3
 
   " saveDone test
@@ -511,7 +511,7 @@ func Nb_basic(port)
   let l = readfile('Xnetbeans')
   call assert_equal('send: 3:saveDone!79', l[-1])
   sleep 1m
-  call assert_match('.*/Xfile4" 3L, 0C', v:statusmsg)
+  call assert_match('.*/Xfile4" 3L, 0B', v:statusmsg)
   let g:last += 3
 
   " unimplemented command test

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1128,
 /**/
     1127,
 /**/