patch 8.1.0542: shiftwidth() does not take 'vartabstop' into accountv8.1.0542

Problem:    shiftwidth() does not take 'vartabstop' into account.
Solution:   Use the cursor position or a position explicitly passed.
            Also make >> and << work better with 'vartabstop'. (Christian
            Brabandt)

2 files changed, 17 insertions, 12 deletions

diff --git a/runtime/doc/change.txt b/runtime/doc/change.txt
index d6b0242d2c..dc3a23c599 100644
--- a/runtime/doc/change.txt
+++ b/runtime/doc/change.txt
@@ -476,6 +476,10 @@ SHIFTING LINES LEFT OR RIGHT				*shift-left-right*
 							*<*
 <{motion}		Shift {motion} lines one 'shiftwidth' leftwards.
 
+			If the 'vartabstop' feature is enabled, and the
+			'shiftwidth' option is set to zero, the amount of
+			indent is calculated at the first non-blank character
+			in the line.
 							*<<*
 <<			Shift [count] lines one 'shiftwidth' leftwards.
 
@@ -487,6 +491,10 @@ SHIFTING LINES LEFT OR RIGHT				*shift-left-right*
 							*>*
  >{motion}		Shift {motion} lines one 'shiftwidth' rightwards.
 
+			If the 'vartabstop' feature is enabled, and the
+			'shiftwidth' option is set to zero, the amount of
+			indent is calculated at the first non-blank character
+			in the line.
 							*>>*
  >>			Shift [count] lines one 'shiftwidth' rightwards.
 
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 07c88d114c..5e6545cbdd 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -2308,7 +2308,6 @@ perleval({expr})		any	evaluate |Perl| expression
 pow({x}, {y})			Float	{x} to the power of {y}
 prevnonblank({lnum})		Number	line nr of non-blank line <= {lnum}
 printf({fmt}, {expr1}...)	String	format text
-prompt_addtext({buf}, {expr})	none	add text to a prompt buffer
 prompt_setcallback({buf}, {expr}) none	set prompt callback function
 prompt_setinterrupt({buf}, {text}) none	set prompt interrupt function
 prompt_setprompt({buf}, {text}) none	set prompt text
@@ -2386,7 +2385,7 @@ sha256({string})		String	SHA256 checksum of {string}
 shellescape({string} [, {special}])
 				String	escape {string} for use as shell
 					command argument
-shiftwidth([{list}])		Number	effective value of 'shiftwidth'
+shiftwidth([{col}])		Number	effective value of 'shiftwidth'
 simplify({filename})		String	simplify filename as much as possible
 sin({expr})			Float	sine of {expr}
 sinh({expr})			Float	hyperbolic sine of {expr}
@@ -7639,19 +7638,17 @@ shellescape({string} [, {special}])			*shellescape()*
 <		See also |::S|.
 
 
-shiftwidth([{list}])						*shiftwidth()*
+shiftwidth([{col}])						*shiftwidth()*
 		Returns the effective value of 'shiftwidth'. This is the
 		'shiftwidth' value unless it is zero, in which case it is the
 		'tabstop' value.  This function was introduced with patch
-		7.3.694 in 2012, everybody should have it by now.
-
-		When there is one argument {list} this is used as position
-		|List| for which to return the 'shiftwidth' value (actually
-		only the column number is relevant). This matters for the
-		'vartabstop' feature. For the {list} arguments see |cursor()|
-		function. If the 'vartabstop' setting is enabled and no
-		{list} argument is given, the current cursor position is
-		taken into account.
+		7.3.694 in 2012, everybody should have it by now (however it
+		did not allow for the optional {col} argument until 8.1.542).
+
+		When there is one argument {col} this is used as column number
+		for which to return the 'shiftwidth' value. This matters for the
+		'vartabstop' feature. If the 'vartabstop' setting is enabled and
+		no {col} argument is given, column 1 will be assumed.
 
 
 simplify({filename})					*simplify()*