vim-patch:8.2.0573: using :version twice leaks memory

Problem:    using :version twice leaks memory
Solution:   Only initialize variables once. (Dominique Pelle, closes vim/vim#5917)
278e83863b

Cherry-pick test_alot.vim change from patch v8.2.0164
so that test_expr.vim and test_version.vim do not conflict.
Cherry-pick modeline from patch v8.2.1432.

N/A patches for version.c:

vim-patch:8.1.0103: long version string cannot be translated

Problem:    Long version string cannot be translated.
Solution:   Build the string in init_longVersion().
35fb6fbf72

vim-patch:8.1.0975: using STRNCPY() wrongly. Warning for uninitialized variable

Problem:    Using STRNCPY() wrongly. Warning for uninitialized variable.
Solution:   Use mch_memmove(). Initialize variable. (Yasuhiro Matsumoto,
            closes vim/vim#3979)
c666388367

vim-patch:8.1.1403: cannot build without the timer feature

Problem:    Cannot build without the timer feature.
Solution:   Add #ifdef.
35d5af6c0b

vim-patch:8.1.1569: cannot build with signs but without diff feature

Problem:    Cannot build with signs but without diff feature.
Solution:   Move #ifdef. (Tom Ryder)
bf8c3adef2

vim-patch:8.1.1856: popup preview test fails sometimes

Problem:    popup preview test fails sometimes. (Christian Brabandt)
Solution:   Clear the command line.
78d629a385

vim-patch:8.1.1983: compiler nags for uninitialized variable and unused function

Problem:    Compiler nags for uninitialized variable and unused function.
Solution:   Add unnecessary initialization.  Move function inside #ifdef.
ea781459b9

vim-patch:8.1.2014: terminal altscreen test fails sometimes

Problem:    Terminal altscreen test fails sometimes.
Solution:   Use WaitFor().
b9c79cf5cc

vim-patch:8.1.2365: missing tests for recent popupwin changes

Problem:    Missing tests for recent popupwin changes.
Solution:   Add test cases.
20ebbeac46

vim-patch:8.1.2406: leaking memory in test_paste and test_registers

Problem:    Leaking memory in test_paste and test_registers.
Solution:   Free the old title.  Don't copy expr_line.
6b649ac4fd

vim-patch:8.2.0616: build error when disabling the diff feature

Problem:    Build error when disabling the diff feature.
Solution:   Move parenthesis outside of #ifdef. (Tom Ryder)
e770598f31

vim-patch:8.2.1020: popupwin test fails in the GUI

Problem:    Popupwin test fails in the GUI.
Solution:   Send GUI byte sequence for <C-S-a>.
b326edf5b3

vim-patch:8.2.1036: popupwin test fails sometimes

Problem:    Popupwin test fails sometimes.
Solution:   Use WaitForAssert() instead of a sleep.
373c65104e

vim-patch:8.2.1038: popupwin test fails

Problem:    Popupwin test fails.
Solution:   Fix WaitForAssert() argument.
b2b218d89b

vim-patch:8.2.1743: cannot build without the eval feature

Problem:    Cannot build without the eval feature.
Solution:   Move shorten_dir outside of #ifdef.
273af497ca

vim-patch:8.2.1843: Netbeans: with huge buffer number memory allocation may fail

Problem:    Netbeans: with huge buffer number memory allocation may fail.
Solution:   Check for size overflow.
b9616af23f

src/nvim/testdir/test_alot.vim

@@ -13,7 +13,6 @@ source test_ex_undo.vim
 source test_ex_z.vim
 source test_execute_func.vim
 source test_expand_func.vim
-source test_expr.vim
 source test_feedkeys.vim
 source test_filter_cmd.vim
 source test_filter_map.vim
@@ -50,6 +49,7 @@ source test_tagjump.vim
 source test_taglist.vim
 source test_true_false.vim
 source test_unlet.vim
+source test_version.vim
 source test_virtualedit.vim
 source test_window_cmd.vim
 source test_wnext.vim

src/nvim/testdir/test_version.vim

@@ -0,0 +1,12 @@
+" Test :version Ex command
+
+func Test_version()
+  " version should always return the same string.
+  let v1 = execute('version')
+  let v2 = execute('version')
+  call assert_equal(v1, v2)
+
+  call assert_match("^\n\nNVIM v[0-9]\\+\\.[0-9]\\+\\.[0-9]\\+.*", v1)
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab