docs(builtin): small fixes (#24861)

Also make gen_eval_files.lua render vimdoc helpExamples properly if the line
begins with the `>` marker.

runtime/lua/vim/_meta/vimfn.lua

@@ -3853,7 +3853,7 @@ function vim.fn.globpath(path, expr, nosuf, list, allinks) end
 ---   clipboard  |clipboard| provider is available.
 ---   fname_case  Case in file names matters (for Darwin and MS-Windows
 ---       this is not present).
----                         gui_running  Nvim has a GUI.
+---   gui_running  Nvim has a GUI.
 ---   iconv    Can use |iconv()| for conversion.
 ---   linux    Linux system.
 ---   mac    MacOS system.
@@ -8765,7 +8765,7 @@ function vim.fn.srand(expr) end
 --- added.  E.g, this checks if the screen has scrolled: >vim
 ---   if state('s') == ''
 ---      " screen has not scrolled
----
+--- <
 --- These characters indicate the state, generally indicating that
 --- something is busy:
 ---     m  halfway a mapping, :normal command, feedkeys() or
@@ -9446,7 +9446,6 @@ function vim.fn.synIDtrans(synID) end
 ---   synconcealed(lnum, 4)   [1, 'X', 2]
 ---   synconcealed(lnum, 5)   [1, 'X', 2]
 ---   synconcealed(lnum, 6)   [0, '', 0]
---- <
 ---
 --- @param lnum integer
 --- @param col integer