runtime(doc): Fix style in fold.txt

closes: #16236

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: h-east <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/doc/fold.txt

@@ -1,4 +1,4 @@
-*fold.txt*      For Vim version 9.1.  Last change: 2024 Dec 16
+*fold.txt*      For Vim version 9.1.  Last change: 2024 Dec 17
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -106,7 +106,8 @@ The result of foldexpr then determines the fold level as follows:
   "<1", "<2", ..	a fold with this level ends at this line
   ">1", ">2", ..	a fold with this level starts at this line
 
-The result values "=", "s" and "a" are more expensive, please see |fold-expr-slow|.
+The result values "=", "s" and "a" are more expensive, please see
+|fold-expr-slow|.
 
 It is not required to mark the start (end) of a fold with ">1" ("<1"), a fold
 will also start (end) when the fold level is higher (lower) than the fold
@@ -122,7 +123,7 @@ For debugging the 'debug' option can be set to "msg", the error messages will
 be visible then.
 
 If the 'foldexpr' expression starts with s: or |<SID>|, then it is replaced
-with the script ID (|local-function|). Examples: >
+with the script ID (|local-function|).  Examples: >
 		set foldexpr=s:MyFoldExpr()
 		set foldexpr=<SID>SomeFoldExpr()
 <
@@ -146,21 +147,23 @@ end in that line.
 It may happen that folds are not updated properly.  You can use |zx| or |zX|
 to force updating folds.
 
-Minimizing Computational Cost			             *fold-expr-slow*
+MINIMIZING COMPUTATIONAL COST				*fold-expr-slow*
 
 Due to its computational cost, this fold method can make Vim unresponsive,
 especially when the fold level of all lines have to be initially computed.
 Afterwards, after each change, Vim restricts the computation of foldlevels
 to those lines whose fold level was affected by it (and reuses the known
 foldlevels of all the others).
 
-The fold expression should therefore strive to minimize the number of dependent
-lines needed for the computation of a given line: For example, try to avoid the
-"=", "a" and "s" return values, because these will require the evaluation of the
-fold levels on previous lines until an independent fold level is found.
+The fold expression should therefore strive to minimize the number of
+dependent lines needed for the computation of a given line: For example, try
+to avoid the "=", "a" and "s" return values, because these will require the
+evaluation of the fold levels on previous lines until an independent fold
+level is found.
 
-If this proves difficult, the next best thing could be to cache all fold levels
-in a buffer-local variable (b:foldlevels) that is only updated on |b:changedtick|:
+If this proves difficult, the next best thing could be to cache all fold
+levels in a buffer-local variable (b:foldlevels) that is only updated on
+|b:changedtick|:
 >vim
   vim9script
   def MyFoldFunc(): number
@@ -174,8 +177,9 @@ in a buffer-local variable (b:foldlevels) that is only updated on |b:changedtick
   enddef
   set foldexpr=s:MyFoldFunc()
 <
-In above example further speedup was gained by using a precompiled Vim9script
-function without arguments (that must still use v:lnum). See |expr-option-function|.
+In above example further speedup was gained by using a precompiled Vim9 script
+function without arguments (that must still use v:lnum).  See
+|expr-option-function|.
 
 SYNTAX						*fold-syntax*
 
@@ -412,8 +416,8 @@ zX		Undo manually opened and closed folds: re-apply 'foldlevel'.
 		Also forces recomputing folds, like |zx|.
 
 							*zm*
-zm		Fold more: Subtract |v:count1| from 'foldlevel'.  If 'foldlevel' was
-		already zero nothing happens.
+zm		Fold more: Subtract |v:count1| from 'foldlevel'.  If
+		'foldlevel' was already zero nothing happens.
 		'foldenable' will be set.
 
 							*zM*
@@ -477,7 +481,7 @@ zk		Move upwards to the end of the previous fold.  A closed fold
 
 EXECUTING COMMANDS ON FOLDS ~
 
-:[range]foldd[oopen] {cmd}			*:foldd* *:folddo* *:folddoopen*
+:[range]foldd[oopen] {cmd}		*:foldd* *:folddo* *:folddoopen*
 		Execute {cmd} on all lines that are not in a closed fold.
 		When [range] is given, only these lines are used.
 		Each time {cmd} is executed the cursor is positioned on the
@@ -567,7 +571,7 @@ When there is room after the text, it is filled with the character specified
 by 'fillchars'.
 
 If the 'foldtext' expression starts with s: or |<SID>|, then it is replaced
-with the script ID (|local-function|). Examples: >
+with the script ID (|local-function|).  Examples: >
 		set foldtext=s:MyFoldText()
 		set foldtext=<SID>SomeFoldText()
 <