patch 8.0.0176: cannot use :change inside a function definition

Problem:    Using :change in between :function and :endfunction fails.
Solution:   Recognize :change inside a function. (ichizok, closes #1374)

Author: brammool

src/testdir/test_viml.vim

@@ -1238,6 +1238,77 @@ func Test_num64()
     call assert_equal(rng, sort(range(0x100000001, 0xFFFFffff, -1), 'N'))
 endfunc
 
+"-------------------------------------------------------------------------------
+" Test 95:  lines of :append, :change, :insert			    {{{1
+"-------------------------------------------------------------------------------
+
+function! DefineFunction(name, body)
+    let func = join(['function! ' . a:name . '()'] + a:body + ['endfunction'], "\n")
+    exec func
+endfunction
+
+func Test_script_lines()
+    " :append
+    try
+        call DefineFunction('T_Append', [
+                    \ 'append',
+                    \ 'py <<EOS',
+                    \ '.',
+                    \ ])
+    catch
+        call assert_false(1, "Can't define function")
+    endtry
+    try
+        call DefineFunction('T_Append', [
+                    \ 'append',
+                    \ 'abc',
+                    \ ])
+        call assert_false(1, "Shouldn't be able to define function")
+    catch
+        call assert_exception('Vim(function):E126: Missing :endfunction')
+    endtry
+
+    " :change
+    try
+        call DefineFunction('T_Change', [
+                    \ 'change',
+                    \ 'py <<EOS',
+                    \ '.',
+                    \ ])
+    catch
+        call assert_false(1, "Can't define function")
+    endtry
+    try
+        call DefineFunction('T_Change', [
+                    \ 'change',
+                    \ 'abc',
+                    \ ])
+        call assert_false(1, "Shouldn't be able to define function")
+    catch
+        call assert_exception('Vim(function):E126: Missing :endfunction')
+    endtry
+
+    " :insert
+    try
+        call DefineFunction('T_Insert', [
+                    \ 'insert',
+                    \ 'py <<EOS',
+                    \ '.',
+                    \ ])
+    catch
+        call assert_false(1, "Can't define function")
+    endtry
+    try
+        call DefineFunction('T_Insert', [
+                    \ 'insert',
+                    \ 'abc',
+                    \ ])
+        call assert_false(1, "Shouldn't be able to define function")
+    catch
+        call assert_exception('Vim(function):E126: Missing :endfunction')
+    endtry
+endfunc
+
 "-------------------------------------------------------------------------------
 " Modelines								    {{{1
 " vim: ts=8 sw=4 tw=80 fdm=marker

src/userfunc.c

@@ -2085,9 +2085,14 @@ ex_function(exarg_T *eap)
 		}
 	    }
 
-	    /* Check for ":append" or ":insert". */
+	    /* Check for ":append", ":change", ":insert". */
 	    p = skip_range(p, NULL);
 	    if ((p[0] == 'a' && (!ASCII_ISALPHA(p[1]) || p[1] == 'p'))
+		    || (p[0] == 'c'
+			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'h'
+				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 'a'
+					&& (STRNCMP(&p[3], "nge", 3) != 0
+					    || !ASCII_ISALPHA(p[6])))))))
 		    || (p[0] == 'i'
 			&& (!ASCII_ISALPHA(p[1]) || (p[1] == 'n'
 				&& (!ASCII_ISALPHA(p[2]) || (p[2] == 's'))))))

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    176,
 /**/
     175,
 /**/