fix(eval/method): add missing method support for existing built-ins

These functions were ported with the vim-patch token, but didn't actually port
the method call support that was in their patches (method call syntax wasn't
ported yet).

Add the missing method call support and latest docs for:
 - assert_nobeep:
   https://github.com/vim/vim/commit/5b8cabfef7c3707f3e53e13844d90e5a217e1e84
 - buffer_name, buffer_number: (obsolete)
   https://github.com/vim/vim/commit/a8eee21e75324d199acb1663cb5009e03014a13a
 - charidx:
   https://github.com/vim/vim/commit/17793ef23aae0bc94539390ccfe5e63b0ad39ff2
 - flatten:
   https://github.com/vim/vim/commit/077a1e670ad69ef4cefc22103ca6635bd269e764
 - prompt_getprompt:
   https://github.com/vim/vim/commit/077cc7aa0e0c431e97795612374fe17fe7c88803
 - searchcount:
   https://github.com/vim/vim/commit/e8f5ec0d30b629d7166f0ad03434065d8bc822df
 - strptime:
   https://github.com/vim/vim/commit/10455d43fef041309ce0613fa792c635dd71e3a8
 - win_gettype:
   https://github.com/vim/vim/commit/00f3b4e007af07870168bf044cecc9d544483953
 - win_splitmove:
   https://github.com/vim/vim/commit/d20dcb3d011da6111153109f6e46fbd5c7fe9fb6

Also fix assert_beeps, assert_nobeep and getenv to accept exactly one argument.
Previously, they could erroneously accept one or more.

2 files changed, 13 insertions, 15 deletions

diff --git a/src/nvim/eval.lua b/src/nvim/eval.lua
index 75e28df98f..9a76b67de6 100644
--- a/src/nvim/eval.lua
+++ b/src/nvim/eval.lua
@@ -33,7 +33,7 @@ return {
     arglistid={args={0, 2}},
     argv={args={0, 2}},
     asin={args=1, base=1, func="float_op_wrapper", data="&asin"},  -- WJMc
-    assert_beeps={args={1}, base=1},
+    assert_beeps={args=1, base=1},
     assert_equal={args={2, 3}, base=2},
     assert_equalfile={args={2, 3}, base=1},
     assert_exception={args={1, 2}},
@@ -41,7 +41,7 @@ return {
     assert_false={args={1, 2}, base=1},
     assert_inrange={args={3, 4}, base=3},
     assert_match={args={2, 3}, base=2},
-    assert_nobeep={args={1}},
+    assert_nobeep={args=1, base=1},
     assert_notequal={args={2, 3}, base=2},
     assert_notmatch={args={2, 3}, base=2},
     assert_report={args=1, base=1},
@@ -53,8 +53,8 @@ return {
     bufadd={args=1, base=1},
     bufexists={args=1, base=1},
     buffer_exists={args=1, base=1, func='f_bufexists'},  -- obsolete
-    buffer_name={args={0, 1}, func='f_bufname'},  -- obsolete
-    buffer_number={args={0, 1}, func='f_bufnr'},  -- obsolete
+    buffer_name={args={0, 1}, base=1, func='f_bufname'},  -- obsolete
+    buffer_number={args={0, 1}, base=1, func='f_bufnr'},  -- obsolete
     buflisted={args=1, base=1},
     bufload={args=1, base=1},
     bufloaded={args=1, base=1},
@@ -71,7 +71,7 @@ return {
     chanclose={args={1, 2}},
     chansend={args=2},
     char2nr={args={1, 2}, base=1},
-    charidx={args={2, 3}},
+    charidx={args={2, 3}, base=1},
     chdir={args=1, base=1},
     cindent={args=1, base=1},
     clearmatches={args={0, 1}, base=1},
@@ -121,7 +121,7 @@ return {
     filter={args=2, base=1},
     finddir={args={1, 3}, base=1},
     findfile={args={1, 3}, base=1},
-    flatten={args={1, 2}},
+    flatten={args={1, 2}, base=1},
     float2nr={args=1, base=1},
     floor={args=1, base=1, func="float_op_wrapper", data="&floor"},
     fmod={args=2, base=1},
@@ -152,7 +152,7 @@ return {
     getcompletion={args={2, 3}, base=1},
     getcurpos={},
     getcwd={args={0, 2}, base=1},
-    getenv={args={1}, base=1},
+    getenv={args=1, base=1},
     getfontname={args={0, 1}},
     getfperm={args=1, base=1},
     getfsize={args=1, base=1},
@@ -262,7 +262,7 @@ return {
     pow={args=2, base=1},
     prevnonblank={args=1, base=1},
     printf={args=varargs(1), base=2},
-    prompt_getprompt={args=1},
+    prompt_getprompt={args=1, base=1},
     prompt_setcallback={args={2, 2}, base=1},
     prompt_setinterrupt={args={2, 2}, base=1},
     prompt_setprompt={args={2, 2}, base=1},
@@ -299,7 +299,7 @@ return {
     screenrow={},
     screenstring={args=2, base=1},
     search={args={1, 4}, base=1},
-    searchcount={args={0,1}},
+    searchcount={args={0, 1}, base=1},
     searchdecl={args={1, 3}, base=1},
     searchpair={args={3, 7}},
     searchpairpos={args={3, 7}},
@@ -359,7 +359,7 @@ return {
     string={args=1, base=1},
     strlen={args=1, base=1},
     strpart={args={2, 4}, base=1},
-    strptime={args=2},
+    strptime={args=2, base=1},
     strridx={args={2, 3}, base=1},
     strtrans={args=1, base=1},
     strwidth={args=1, base=1},
@@ -407,12 +407,12 @@ return {
     win_execute={args={2, 3}, base=2},
     win_findbuf={args=1, base=1},
     win_getid={args={0, 2}, base=1},
-    win_gettype={args={0,1}},
+    win_gettype={args={0, 1}, base=1},
     win_gotoid={args=1, base=1},
     win_id2tabwin={args=1, base=1},
     win_id2win={args=1, base=1},
     win_screenpos={args=1, base=1},
-    win_splitmove={args={2, 3}},
+    win_splitmove={args={2, 3}, base=1},
     winbufnr={args=1, base=1},
     wincol={},
     windowsversion={},
diff --git a/src/nvim/testdir/test_prompt_buffer.vim b/src/nvim/testdir/test_prompt_buffer.vim
index 3da46eb1a6..c59a00afcc 100644
--- a/src/nvim/testdir/test_prompt_buffer.vim
+++ b/src/nvim/testdir/test_prompt_buffer.vim
@@ -165,9 +165,7 @@ func Test_prompt_buffer_getbufinfo()
   call assert_equal('This is a test: ', prompt_getprompt('%'))
 
   call prompt_setprompt( bufnr( '%' ), '' )
-  " Nvim doesn't support method call syntax yet.
-  " call assert_equal('', '%'->prompt_getprompt())
-  call assert_equal('', prompt_getprompt('%'))
+  call assert_equal('', '%'->prompt_getprompt())
 
   call prompt_setprompt( bufnr( '%' ), 'Another: ' )
   call assert_equal('Another: ', prompt_getprompt('%'))