feat(lua): send "--" literally to Lua "-l" script

Problem:
When "-l" is followed by "--", we stop sending args to the Lua script
and treat "--" in the usual way. This was for flexibility but didn't
have a strong use-case, and has these problems:
- prevents Lua "-l" scripts from handling "--" in their own way.
- complicates the startup logic (must call nlua_init before command_line_scan)

Solution:
Don't treat "--" specially if it follows "-l".

1 files changed, 19 insertions, 6 deletions

diff --git a/src/man/nvim.1 b/src/man/nvim.1
index 457d785365..c32bdeadc6 100644
--- a/src/man/nvim.1
+++ b/src/man/nvim.1
@@ -122,9 +122,6 @@ modifications.
 .It Fl b
 Binary mode.
 .Ic ":help edit-binary"
-.It Fl l
-Lisp mode.
-Sets the 'lisp' and 'showmatch' options.
 .It Fl A
 Arabic mode.
 Sets the 'arabic' option.
@@ -144,7 +141,7 @@ is specified, append messages to
 instead of printing them.
 .Ic ":help 'verbose'"
 .It Fl D
-Debug mode for VimL (Vim script).
+Vimscript debug mode.
 Started when executing the first command from a script.
 :help debug-mode
 .It Fl n
@@ -268,10 +265,26 @@ but execute
 before processing any vimrc.
 Up to 10 instances of these can be used independently from instances of
 .Fl c .
+.It Fl l Ar script Op Ar args
+Execute Lua
+.Ar script
+with optional
+.Op Ar args
+after processing any preceding Nvim startup arguments.
+All
+.Op Ar args
+are treated as script arguments and are passed literally to Lua, that is,
+.Fl l
+stops processing of Nvim arguments.
+.Ic ":help -l"
 .It Fl S Op Ar session
-Source
+Execute
+.Ar session
+after the first file argument has been read. If
 .Ar session
-after the first file argument has been read.
+filename ends with
+.Pa .lua
+it is executed as Lua instead of Vimscript.
 Equivalent to
 .Cm -c \(dqsource session\(dq .
 .Ar session