diff --git a/runtime/doc/dev_arch.txt b/runtime/doc/dev_arch.txt
index 8363e22d28..4928ead1ca 100644
--- a/runtime/doc/dev_arch.txt
+++ b/runtime/doc/dev_arch.txt
@@ -436,7 +436,7 @@ The basic structure described for normal mode in 3, 4 and 5 is used for other
 modes managed by the `state_enter` loop:
 
 - command-line mode: `command_line_{enter,check,execute}()`(`ex_getln.c`)
-- insert mode: `insert_{enter,check,execute}()`(`edit.c`)
+- insert mode: `insert_{enter,check,execute}()`(`insert.c`)
 - terminal mode: `terminal_{enter,execute}()`(`terminal.c`)
 
 IMPORTANT VARIABLES
diff --git a/runtime/doc/dev_tools.txt b/runtime/doc/dev_tools.txt
index 3d2a8c6b1d..6dd081fd8f 100644
--- a/runtime/doc/dev_tools.txt
+++ b/runtime/doc/dev_tools.txt
@@ -31,7 +31,7 @@ You can start hacking on Nvim in less than 5 minutes:
    Tests that want to check the UI can also use `screen:expect()`.
 6. Now make a code change in Nvim itself, then you can see the effects. The
    example test does `feed('iline1…')`, so let's make a change to the
-   insert-mode code, which lives in `src/nvim/edit.c`. In the
+   insert-mode code, which lives in `src/nvim/insert.c`. In the
    `insert_handle_key` function, just after the `normalchar` label, add this
    code: >
         s->c = 'x';
diff --git a/scripts/vim-patch.sh b/scripts/vim-patch.sh
index cfe2f54d84..83abfe58fb 100755
--- a/scripts/vim-patch.sh
+++ b/scripts/vim-patch.sh
@@ -283,6 +283,10 @@ preprocess_patch() {
   LC_ALL=C sed -Ee 's/( [ab]\/src\/nvim)\/getchar\.c/\1\/input.c/g' \
     "$file" > "$file".tmp && mv "$file".tmp "$file"
 
+  # Rename edit.c to insert.c
+  LC_ALL=C sed -Ee 's/( [ab]\/src\/nvim)\/edit\.c/\1\/insert.c/g' \
+    "$file" > "$file".tmp && mv "$file".tmp "$file"
+
   # Rename profiler.c to profile.c
   LC_ALL=C sed -Ee 's/( [ab]\/src\/nvim)\/profiler\.c/\1\/profile.c/g' \
     "$file" > "$file".tmp && mv "$file".tmp "$file"
diff --git a/src/nvim/change.c b/src/nvim/change.c
index 236cb9cd4c..3c940788a9 100644
--- a/src/nvim/change.c
+++ b/src/nvim/change.c
@@ -17,7 +17,6 @@
 #include "nvim/cursor.h"
 #include "nvim/diff.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/eval/vars.h"
 #include "nvim/ex_cmds_defs.h"
 #include "nvim/extmark.h"
@@ -28,6 +27,7 @@
 #include "nvim/highlight_defs.h"
 #include "nvim/indent.h"
 #include "nvim/indent_c.h"
+#include "nvim/insert.h"
 #include "nvim/insexpand.h"
 #include "nvim/macros_defs.h"
 #include "nvim/mark.h"
diff --git a/src/nvim/eval.c b/src/nvim/eval.c
index e815c450d5..36ed3324dc 100644
--- a/src/nvim/eval.c
+++ b/src/nvim/eval.c
@@ -22,7 +22,6 @@
 #include "nvim/cmdexpand_defs.h"
 #include "nvim/context.h"
 #include "nvim/cursor.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/encode.h"
@@ -45,6 +44,7 @@
 #include "nvim/globals.h"
 #include "nvim/hashtab.h"
 #include "nvim/highlight_group.h"
+#include "nvim/insert.h"
 #include "nvim/insexpand.h"
 #include "nvim/keycodes.h"
 #include "nvim/lib/queue_defs.h"
diff --git a/src/nvim/eval/buffer.c b/src/nvim/eval/buffer.c
index 396282137e..260837227c 100644
--- a/src/nvim/eval/buffer.c
+++ b/src/nvim/eval/buffer.c
@@ -13,7 +13,6 @@
 #include "nvim/context.h"
 #include "nvim/cursor.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/eval.h"
 #include "nvim/eval/buffer.h"
 #include "nvim/eval/funcs.h"
@@ -23,6 +22,7 @@
 #include "nvim/ex_cmds.h"
 #include "nvim/extmark.h"
 #include "nvim/globals.h"
+#include "nvim/insert.h"
 #include "nvim/macros_defs.h"
 #include "nvim/memline.h"
 #include "nvim/memory.h"
diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index c1fe8bce79..6ad986ec91 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -35,7 +35,6 @@
 #include "nvim/context.h"
 #include "nvim/cursor.h"
 #include "nvim/dialog.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval/buffer.h"
 #include "nvim/eval/decode.h"
@@ -69,6 +68,7 @@
 #include "nvim/indent_c.h"
 #include "nvim/input.h"
 #include "nvim/input_defs.h"
+#include "nvim/insert.h"
 #include "nvim/insexpand.h"
 #include "nvim/keycodes.h"
 #include "nvim/lua/executor.h"
diff --git a/src/nvim/ex_cmds.c b/src/nvim/ex_cmds.c
index d28e28dae2..239e7bab9f 100644
--- a/src/nvim/ex_cmds.c
+++ b/src/nvim/ex_cmds.c
@@ -35,7 +35,6 @@
 #include "nvim/diff.h"
 #include "nvim/digraph.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval/typval.h"
 #include "nvim/eval/typval_defs.h"
@@ -57,6 +56,7 @@
 #include "nvim/highlight_group.h"
 #include "nvim/indent.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/lua/executor.h"
 #include "nvim/macros_defs.h"
 #include "nvim/main.h"
diff --git a/src/nvim/ex_docmd.c b/src/nvim/ex_docmd.c
index 598e7a9aca..1ebc0c3122 100644
--- a/src/nvim/ex_docmd.c
+++ b/src/nvim/ex_docmd.c
@@ -37,7 +37,6 @@
 #include "nvim/dialog.h"
 #include "nvim/digraph.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval/fs.h"
 #include "nvim/eval/funcs.h"
@@ -67,6 +66,7 @@
 #include "nvim/highlight_defs.h"
 #include "nvim/highlight_group.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/keycodes.h"
 #include "nvim/lua/executor.h"
 #include "nvim/macros_defs.h"
diff --git a/src/nvim/ex_getln.c b/src/nvim/ex_getln.c
index a899414ff6..d13900369b 100644
--- a/src/nvim/ex_getln.c
+++ b/src/nvim/ex_getln.c
@@ -28,7 +28,6 @@
 #include "nvim/cursor.h"
 #include "nvim/digraph.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/typval.h"
@@ -49,6 +48,7 @@
 #include "nvim/highlight_defs.h"
 #include "nvim/highlight_group.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/keycodes.h"
 #include "nvim/lua/executor.h"
 #include "nvim/macros_defs.h"
diff --git a/src/nvim/fileio.c b/src/nvim/fileio.c
index 0c97b9d2ec..72a0b9f24a 100644
--- a/src/nvim/fileio.c
+++ b/src/nvim/fileio.c
@@ -28,7 +28,6 @@
 #include "nvim/dialog.h"
 #include "nvim/diff.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/vars.h"
@@ -43,6 +42,7 @@
 #include "nvim/highlight_defs.h"
 #include "nvim/iconv_defs.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/log.h"
 #include "nvim/macros_defs.h"
 #include "nvim/mbyte.h"
diff --git a/src/nvim/indent.c b/src/nvim/indent.c
index ad83540944..005a4ec579 100644
--- a/src/nvim/indent.c
+++ b/src/nvim/indent.c
@@ -12,7 +12,6 @@
 #include "nvim/charset.h"
 #include "nvim/cursor.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/typval.h"
@@ -26,6 +25,7 @@
 #include "nvim/globals.h"
 #include "nvim/indent.h"
 #include "nvim/indent_c.h"
+#include "nvim/insert.h"
 #include "nvim/mark_defs.h"
 #include "nvim/mbyte.h"
 #include "nvim/mbyte_defs.h"
diff --git a/src/nvim/indent_c.c b/src/nvim/indent_c.c
index 81b165b5ef..2ec60989af 100644
--- a/src/nvim/indent_c.c
+++ b/src/nvim/indent_c.c
@@ -8,11 +8,11 @@
 #include "nvim/buffer_defs.h"
 #include "nvim/charset.h"
 #include "nvim/cursor.h"
-#include "nvim/edit.h"
 #include "nvim/eval/typval.h"
 #include "nvim/globals.h"
 #include "nvim/indent.h"
 #include "nvim/indent_c.h"
+#include "nvim/insert.h"
 #include "nvim/keycodes.h"
 #include "nvim/macros_defs.h"
 #include "nvim/mark_defs.h"
diff --git a/src/nvim/input.c b/src/nvim/input.c
index 801153fec5..f96af3ca4b 100644
--- a/src/nvim/input.c
+++ b/src/nvim/input.c
@@ -50,7 +50,6 @@
 #include "nvim/charset.h"
 #include "nvim/cursor.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/typval.h"
@@ -67,6 +66,7 @@
 #include "nvim/gettext_defs.h"
 #include "nvim/globals.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/insexpand.h"
 #include "nvim/keycodes.h"
 #include "nvim/lua/executor.h"
diff --git a/src/nvim/edit.c b/src/nvim/insert.c
similarity index 99%
rename from src/nvim/edit.c
rename to src/nvim/insert.c
index 0065bba985..7cfa94f4a0 100644
--- a/src/nvim/edit.c
+++ b/src/nvim/insert.c
@@ -1,4 +1,4 @@
-// edit.c: functions for Insert mode
+// insert.c: functions for Insert mode
 
 #include <assert.h>
 #include <ctype.h>
@@ -22,7 +22,6 @@
 #include "nvim/decoration.h"
 #include "nvim/digraph.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/typval_defs.h"
@@ -44,6 +43,7 @@
 #include "nvim/indent.h"
 #include "nvim/indent_c.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/insexpand.h"
 #include "nvim/keycodes.h"
 #include "nvim/macros_defs.h"
@@ -107,7 +107,7 @@ typedef struct {
   bool nomove;
 } InsertState;
 
-#include "edit.c.generated.h"
+#include "insert.c.generated.h"
 enum {
   BACKSPACE_CHAR = 1,
   BACKSPACE_WORD = 2,
diff --git a/src/nvim/edit.h b/src/nvim/insert.h
similarity index 96%
rename from src/nvim/edit.h
rename to src/nvim/insert.h
index f86dde772f..bf9c0ba4b8 100644
--- a/src/nvim/edit.h
+++ b/src/nvim/insert.h
@@ -34,4 +34,4 @@ enum {
   INSCHAR_COM_LIST = 16,  ///< format comments with list/2nd line indent
 };
 
-#include "edit.h.generated.h"
+#include "insert.h.generated.h"
diff --git a/src/nvim/insexpand.c b/src/nvim/insexpand.c
index ae6ca72e79..3b27370750 100644
--- a/src/nvim/insexpand.c
+++ b/src/nvim/insexpand.c
@@ -22,7 +22,6 @@
 #include "nvim/cmdexpand_defs.h"
 #include "nvim/cursor.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/executor.h"
@@ -45,6 +44,7 @@
 #include "nvim/indent.h"
 #include "nvim/indent_c.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/insexpand.h"
 #include "nvim/keycodes.h"
 #include "nvim/lua/executor.h"
diff --git a/src/nvim/mark.c b/src/nvim/mark.c
index dd49276edc..95139c58e7 100644
--- a/src/nvim/mark.c
+++ b/src/nvim/mark.c
@@ -15,7 +15,6 @@
 #include "nvim/charset.h"
 #include "nvim/cursor.h"
 #include "nvim/diff.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval/typval.h"
 #include "nvim/eval/typval_defs.h"
@@ -26,6 +25,7 @@
 #include "nvim/gettext_defs.h"
 #include "nvim/globals.h"
 #include "nvim/highlight_defs.h"
+#include "nvim/insert.h"
 #include "nvim/mark.h"
 #include "nvim/mbyte.h"
 #include "nvim/memline.h"
diff --git a/src/nvim/memory.c b/src/nvim/memory.c
index 74109ed41e..2d6d8ac75e 100644
--- a/src/nvim/memory.c
+++ b/src/nvim/memory.c
@@ -832,12 +832,12 @@ char *arena_strdup(Arena *arena, const char *str)
 # include "nvim/buffer.h"
 # include "nvim/cmdhist.h"
 # include "nvim/diff.h"
-# include "nvim/edit.h"
 # include "nvim/ex_cmds.h"
 # include "nvim/ex_docmd.h"
 # include "nvim/file_search.h"
 # include "nvim/grid.h"
 # include "nvim/input.h"
+# include "nvim/insert.h"
 # include "nvim/mark.h"
 # include "nvim/msgpack_rpc/channel.h"
 # include "nvim/option.h"
diff --git a/src/nvim/mouse.c b/src/nvim/mouse.c
index d7a25c771a..0339b59e63 100644
--- a/src/nvim/mouse.c
+++ b/src/nvim/mouse.c
@@ -13,7 +13,6 @@
 #include "nvim/decoration.h"
 #include "nvim/diff.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/eval.h"
 #include "nvim/eval/typval.h"
 #include "nvim/eval/vars.h"
@@ -23,6 +22,7 @@
 #include "nvim/grid.h"
 #include "nvim/grid_defs.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/keycodes.h"
 #include "nvim/macros_defs.h"
 #include "nvim/mark_defs.h"
diff --git a/src/nvim/move.c b/src/nvim/move.c
index db5d9f1acc..daa093b38f 100644
--- a/src/nvim/move.c
+++ b/src/nvim/move.c
@@ -20,7 +20,6 @@
 #include "nvim/decoration.h"
 #include "nvim/diff.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval/typval.h"
 #include "nvim/eval/window.h"
@@ -30,6 +29,7 @@
 #include "nvim/grid.h"
 #include "nvim/grid_defs.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/macros_defs.h"
 #include "nvim/mark_defs.h"
 #include "nvim/mbyte.h"
diff --git a/src/nvim/normal.c b/src/nvim/normal.c
index cbd920e397..8004680be7 100644
--- a/src/nvim/normal.c
+++ b/src/nvim/normal.c
@@ -28,7 +28,6 @@
 #include "nvim/diff.h"
 #include "nvim/digraph.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/vars.h"
@@ -48,6 +47,7 @@
 #include "nvim/highlight_defs.h"
 #include "nvim/indent_c.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/keycodes.h"
 #include "nvim/lua/executor.h"
 #include "nvim/macros_defs.h"
diff --git a/src/nvim/ops.c b/src/nvim/ops.c
index 72cbd515e0..d945ecccd7 100644
--- a/src/nvim/ops.c
+++ b/src/nvim/ops.c
@@ -25,7 +25,6 @@
 #include "nvim/clipboard.h"
 #include "nvim/cursor.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/typval.h"
@@ -45,6 +44,7 @@
 #include "nvim/indent_c.h"
 #include "nvim/input.h"
 #include "nvim/input_defs.h"
+#include "nvim/insert.h"
 #include "nvim/keycodes.h"
 #include "nvim/macros_defs.h"
 #include "nvim/mark.h"
diff --git a/src/nvim/quickfix.c b/src/nvim/quickfix.c
index 3cf7ddfa43..8d843b87bf 100644
--- a/src/nvim/quickfix.c
+++ b/src/nvim/quickfix.c
@@ -21,7 +21,6 @@
 #include "nvim/context.h"
 #include "nvim/cursor.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/typval.h"
@@ -45,6 +44,7 @@
 #include "nvim/help.h"
 #include "nvim/highlight_defs.h"
 #include "nvim/highlight_group.h"
+#include "nvim/insert.h"
 #include "nvim/macros_defs.h"
 #include "nvim/mark.h"
 #include "nvim/mbyte.h"
diff --git a/src/nvim/register.c b/src/nvim/register.c
index 6a7d1014a0..54471c173b 100644
--- a/src/nvim/register.c
+++ b/src/nvim/register.c
@@ -10,7 +10,6 @@
 #include "nvim/clipboard.h"
 #include "nvim/cursor.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/typval.h"
@@ -23,6 +22,7 @@
 #include "nvim/globals.h"
 #include "nvim/indent.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/insexpand.h"
 #include "nvim/keycodes.h"
 #include "nvim/mark.h"
diff --git a/src/nvim/sign.c b/src/nvim/sign.c
index 49f56795a1..50016e5f04 100644
--- a/src/nvim/sign.c
+++ b/src/nvim/sign.c
@@ -20,7 +20,6 @@
 #include "nvim/decoration.h"
 #include "nvim/decoration_defs.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval/funcs.h"
 #include "nvim/eval/typval.h"
@@ -34,6 +33,7 @@
 #include "nvim/grid.h"
 #include "nvim/highlight_defs.h"
 #include "nvim/highlight_group.h"
+#include "nvim/insert.h"
 #include "nvim/macros_defs.h"
 #include "nvim/map_defs.h"
 #include "nvim/marktree.h"
diff --git a/src/nvim/textformat.c b/src/nvim/textformat.c
index f12fd85b34..083d43af74 100644
--- a/src/nvim/textformat.c
+++ b/src/nvim/textformat.c
@@ -10,7 +10,6 @@
 #include "nvim/charset.h"
 #include "nvim/cursor.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/eval.h"
 #include "nvim/eval/typval_defs.h"
 #include "nvim/eval/vars.h"
@@ -19,6 +18,7 @@
 #include "nvim/indent.h"
 #include "nvim/indent_c.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/macros_defs.h"
 #include "nvim/mark.h"
 #include "nvim/mbyte.h"
diff --git a/src/nvim/textobject.c b/src/nvim/textobject.c
index ae7ccab9ba..0fda512d59 100644
--- a/src/nvim/textobject.c
+++ b/src/nvim/textobject.c
@@ -10,11 +10,11 @@
 #include "nvim/charset.h"
 #include "nvim/cursor.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/eval/funcs.h"
 #include "nvim/fold.h"
 #include "nvim/globals.h"
 #include "nvim/indent.h"
+#include "nvim/insert.h"
 #include "nvim/mark.h"
 #include "nvim/mark_defs.h"
 #include "nvim/mbyte.h"
diff --git a/src/nvim/undo.c b/src/nvim/undo.c
index 062d8d1b81..5f213774f4 100644
--- a/src/nvim/undo.c
+++ b/src/nvim/undo.c
@@ -91,7 +91,6 @@
 #include "nvim/context.h"
 #include "nvim/cursor.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval/funcs.h"
 #include "nvim/eval/typval.h"
@@ -108,6 +107,7 @@
 #include "nvim/globals.h"
 #include "nvim/highlight_defs.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/macros_defs.h"
 #include "nvim/mark.h"
 #include "nvim/mark_defs.h"
diff --git a/src/nvim/window.c b/src/nvim/window.c
index 92537e6a04..aeb1e53050 100644
--- a/src/nvim/window.c
+++ b/src/nvim/window.c
@@ -20,7 +20,6 @@
 #include "nvim/decoration.h"
 #include "nvim/diff.h"
 #include "nvim/drawscreen.h"
-#include "nvim/edit.h"
 #include "nvim/errors.h"
 #include "nvim/eval.h"
 #include "nvim/eval/typval.h"
@@ -42,6 +41,7 @@
 #include "nvim/grid_defs.h"
 #include "nvim/hashtab.h"
 #include "nvim/input.h"
+#include "nvim/insert.h"
 #include "nvim/keycodes.h"
 #include "nvim/macros_defs.h"
 #include "nvim/main.h"
diff --git a/test/functional/api/extmark_spec.lua b/test/functional/api/extmark_spec.lua
index f335ab15a5..28e0d8aa9c 100644
--- a/test/functional/api/extmark_spec.lua
+++ b/test/functional/api/extmark_spec.lua
@@ -538,7 +538,7 @@ describe('API/extmarks', function()
   end)
 
   it('marks move with char inserts', function()
-    -- insertchar in edit.c (the ins_str branch)
+    -- insertchar in insert.c (the ins_str branch)
     screen = Screen.new(15, 10)
     set_extmark(ns, marks[1], 0, 3)
     feed('0')
@@ -555,7 +555,7 @@ describe('API/extmarks', function()
 
   -- gravity right as definted in tk library
   it('marks have gravity right', function()
-    -- insertchar in edit.c (the ins_str branch)
+    -- insertchar in insert.c (the ins_str branch)
     set_extmark(ns, marks[1], 0, 2)
     feed('03l')
     insert('X')
@@ -568,7 +568,7 @@ describe('API/extmarks', function()
   end)
 
   it('we can insert multibyte chars', function()
-    -- insertchar in edit.c
+    -- insertchar in insert.c
     feed('a<cr>12345<esc>')
     set_extmark(ns, marks[1], 1, 2)
     -- Insert a fullwidth (two col) tilde, NICE
@@ -896,7 +896,7 @@ describe('API/extmarks', function()
   end)
 
   it('tab works with expandtab', function()
-    -- ins_tab in edit.c
+    -- ins_tab in insert.c
     feed(':set expandtab<cr><esc>')
     feed(':set shiftwidth=2<cr><esc>')
     set_extmark(ns, marks[1], 0, 2)
@@ -905,7 +905,7 @@ describe('API/extmarks', function()
   end)
 
   it('tabs work', function()
-    -- ins_tab in edit.c
+    -- ins_tab in insert.c
     feed(':set noexpandtab<cr><esc>')
     feed(':set shiftwidth=2<cr><esc>')
     feed(':set softtabstop=2<cr><esc>')