patch 8.2.3914: various spelling mistakes in comments

Problem:    Various spelling mistakes in comments.
Solution:   Fix the mistakes. (Dominique Pellé, closes #9416)
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index ff978ad..8595e8b 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -3378,7 +3378,7 @@
     // "start" is set to eap->line2+1 unless that position is invalid (when
     // eap->line2 pointed to the end of the buffer and nothing was appended)
     // "end" is set to lnum when something has been appended, otherwise
-    // it is the same than "start"  -- Acevedo
+    // it is the same as "start"  -- Acevedo
     if ((cmdmod.cmod_flags & CMOD_LOCKMARKS) == 0)
     {
 	curbuf->b_op_start.lnum = (eap->line2 < curbuf->b_ml.ml_line_count) ?