patch 8.1.0759: showing two characters for tab is limited
Problem: Showing two characters for tab is limited.
Solution: Allow for a third character for "tab:" in 'listchars'. (Nathaniel
Braun, Ken Takata, closes #3810)
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 008926f..be53e9f 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -5063,11 +5063,26 @@
omitted, there is no extra character at the end of the
line.
*lcs-tab*
- tab:xy Two characters to be used to show a tab. The first
- char is used once. The second char is repeated to
- fill the space that the tab normally occupies.
- "tab:>-" will show a tab that takes four spaces as
- ">---". When omitted, a tab is show as ^I.
+ tab:xy[z] Two or three characters to be used to show a tab.
+ The third character is optional.
+
+ tab:xy The 'x' is always used, then 'y' as many times as will
+ fit. Thus "tab:>-" displays:
+ >
+ >-
+ >--
+ etc.
+
+ tab:xyz The 'z' is always used, then 'x' is prepended, and
+ then 'y' is used as many times as will fit. Thus
+ "tab:<->" displays:
+ >
+ <>
+ <->
+ <-->
+ etc.
+
+ When "tab:" is omitted, a tab is shown as ^I.
*lcs-space*
space:c Character to show for a space. When omitted, spaces
are left blank.