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runtime(doc): Clarify list-concatenation a bit more

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Make doc list-concatenation more clear as for += and extend().

1. describe `+=` for list-concatenation more accurately
2. add `extend()` example for list-concatenation
3. Fix CI errors for missing helptags reference |+=|

closes: #13983

Signed-off-by: qeatzy <qeatzy@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
qeatzy
2024-02-07 17:52:25 +01:00
committed by Christian Brabandt
parent 1af35631f8
commit c9c2e2d2ff
1 changed files with 5 additions and 2 deletions
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7
runtime/doc/eval.txt
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@ -1,4 +1,4 @@
*eval.txt* For Vim version 9.1. Last change: 2024 Feb 06
*eval.txt* For Vim version 9.1. Last change: 2024 Feb 07
VIM REFERENCE MANUAL by Bram Moolenaar
@ -303,7 +303,9 @@ List concatenation ~
*list-concatenation*
Two lists can be concatenated with the "+" operator: >
:let longlist = mylist + [5, 6]
A list can be concatenated with another one in place using the "+=" operator or |extend()|: >
:let mylist += [7, 8]
:call extend(mylist, [7, 8])
To prepend or append an item, turn the item into a list by putting [] around
it. To change a list in-place, refer to |list-modification| below.
@ -425,7 +427,8 @@ To change part of a list you can specify the first and last item to be
modified. The value must at least have the number of items in the range: >
:let list[3:5] = [3, 4, 5]
To add items to a List in-place, you can use the |+=| operator: >
To add items to a List in-place, you can use the += operator
|list-concatenation|: >
:let listA = [1, 2]
:let listA += [3, 4]
<