feat(lua): vim.text.indent()

Problem:
Indenting text is a common task in plugins/scripts for
presentation/formatting, yet vim has no way of doing it (especially
"dedent", and especially non-buffer text).

Solution:
Introduce `vim.text.indent()`. It sets the *exact* indentation because
that's a more difficult (and thus more useful) task than merely
"increasing the current indent" (which is somewhat easy with a `gsub()`
one-liner).

1 files changed, 2 insertions, 2 deletions

diff --git a/test/functional/ex_cmds/source_spec.lua b/test/functional/ex_cmds/source_spec.lua
index dba158962f..8a15aa04d1 100644
--- a/test/functional/ex_cmds/source_spec.lua
+++ b/test/functional/ex_cmds/source_spec.lua
@@ -227,7 +227,7 @@ describe(':source', function()
 
         feed('GVkk')
         feed_command(':source')
-        eq('   "\\ a\n    \\ b', exec_lua('return _G.a'))
+        eq(' "\\ a\n  \\ b', exec_lua('return _G.a'))
       end)
 
       it('whole buffer', function()
@@ -247,7 +247,7 @@ describe(':source', function()
         feed_command(':source')
 
         eq(12, eval('g:c'))
-        eq('    \\ 1\n   "\\ 2', exec_lua('return _G.a'))
+        eq('  \\ 1\n "\\ 2', exec_lua('return _G.a'))
         eq(':source (no file)', api.nvim_get_var('sfile_value'))
         eq(':source (no file)', api.nvim_get_var('stack_value'))
         eq(':source (no file)', api.nvim_get_var('script_value'))