patch 8.1.0401: can't get swap name of another buffer
Problem: Can't get swap name of another buffer.
Solution: Add swapname(). (Ozaki Kiichi, closes #3441)
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index fff19da..a5c8a13 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -2417,6 +2417,7 @@
substitute({expr}, {pat}, {sub}, {flags})
String all {pat} in {expr} replaced with {sub}
swapinfo({fname}) Dict information about swap file {fname}
+swapname({expr}) String swap file of buffer {expr}
synID({lnum}, {col}, {trans}) Number syntax ID at {lnum} and {col}
synIDattr({synID}, {what} [, {mode}])
String attribute {what} of syntax ID {synID}
@@ -8042,6 +8043,13 @@
Not a swap file: does not contain correct block ID
Magic number mismatch: Info in first block is invalid
+swapname({expr}) *swapname()*
+ The result is the swap file path of the buffer {expr}.
+ For the use of {expr}, see |bufname()| above.
+ If buffer {expr} is the current buffer, the result is equal to
+ |:swapname| (unless no swap file).
+ If buffer {expr} has no swap file, returns an empty string.
+
synID({lnum}, {col}, {trans}) *synID()*
The result is a Number, which is the syntax ID at the position
{lnum} and {col} in the current window.