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-rw-r--r--runtime/doc/builtin.txt16
1 files changed, 10 insertions, 6 deletions
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 079052b658..75f6cd4313 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -73,7 +73,8 @@ append({lnum}, {text}) *append()*
{lnum} can be zero to insert a line before the first one.
{lnum} is used like with |getline()|.
Returns 1 for failure ({lnum} out of range or out of memory),
- 0 for success. Example: >vim
+ 0 for success. When {text} is an empty list zero is returned,
+ no matter the value of {lnum}. Example: >vim
let failed = append(line('$'), "# THE END")
let failed = append(0, ["Chapter 1", "the beginning"])
<
@@ -96,7 +97,8 @@ appendbufline({buf}, {lnum}, {text}) *appendbufline()*
If {buf} is not a valid buffer or {lnum} is not valid, an
error message is given. Example: >vim
let failed = appendbufline(13, 0, "# THE START")
-<
+< However, when {text} is an empty list then no error is given
+ for an invalid {lnum}, since {lnum} isn't actually used.
argc([{winid}]) *argc()*
The result is the number of files in the argument list. See
@@ -6213,9 +6215,10 @@ setbufline({buf}, {lnum}, {text}) *setbufline()*
To insert lines use |appendbufline()|.
- {text} can be a string to set one line, or a list of strings
- to set multiple lines. If the list extends below the last
- line then those lines are added.
+ {text} can be a string to set one line, or a List of strings
+ to set multiple lines. If the List extends below the last
+ line then those lines are added. If the List is empty then
+ nothing is changed and zero is returned.
For the use of {buf}, see |bufname()| above.
@@ -6374,7 +6377,8 @@ setline({lnum}, {text}) *setline()*
When {lnum} is just below the last line the {text} will be
added below the last line.
{text} can be any type or a List of any type, each item is
- converted to a String.
+ converted to a String. When {text} is an empty List then
+ nothing is changed and FALSE is returned.
If this succeeds, FALSE is returned. If this fails (most likely
because {lnum} is invalid) TRUE is returned.