tweak documentation style

[h-east]

options.txt

• 2 spaces after a sentence
• tweaking line break positions

version9.txt

• s/the diff/the diff mode/

ft_hare.txt

• 2 spaces after a sentence
• Stop justifying the right corner of the tag label.
• It seems that the order of the mode-line commands was unintentionally changed, so change it back.

[chrisbra]

thanks

[zeertzjq]

It seems that this line wasn't changed in :h 'backupdir', even though the exact same line was changed in :h 'directory':

diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 3de624757..1628ff21a 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1236,7 +1236,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 	  will ensure file name uniqueness in the backup directory.
 	  On Win32, it is also possible to end with "\\".  However, When a
 	  separating comma is following, you must use "//", since "\\" will
-	  include the comma in the file name. Therefore it is recommended to
+	  include the comma in the file name.  Therefore it is recommended to
 	  use '//', instead of '\\'.
 	- Environment variables are expanded |:set_env|.
 	- Careful with '\' characters, type one before a space, type two to

And there is another one in :h 'numberwidth':

diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 3de624757..504f362b6 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -6416,7 +6416,7 @@ A jump table for the options with a short description can be found at |Q_op|.
 	fit the highest line number in the buffer respectively the number of
 	rows in the window, depending on whether 'number' or 'relativenumber'
 	is set.  Thus with the Vim default of 4 there is room for a line
-	number up to 999. When the buffer has 1000 lines five columns will be
+	number up to 999.  When the buffer has 1000 lines five columns will be
 	used.  The minimum value is 1, the maximum value is 20.
 	NOTE: This option is set to the Vi default value when 'compatible' is
 	set and to the Vim default value when 'compatible' is reset.

[chrisbra]

thanks, I update this as well.