Update runtime files

runtime/doc/eval.txt

@@ -1,4 +1,4 @@
-*eval.txt*	For Vim version 7.4.  Last change: 2016 Jan 17
+*eval.txt*	For Vim version 7.4.  Last change: 2016 Jan 21
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -103,6 +103,9 @@ When mixing Number and Float the Number is converted to Float.	Otherwise
 there is no automatic conversion of Float.  You can use str2float() for String
 to Float, printf() for Float to String and float2nr() for Float to Number.
 
+						*E891* *E892* *E893* *E894*
+When expecting a Float a Number can also be used, but nothing else.
+
 						*E706* *sticky-type-checking*
 You will get an error if you try to change the type of a variable.  You need
 to |:unlet| it first to avoid this error.  String and Number are considered
@@ -3601,7 +3604,8 @@ getftype({fname})					*getftype()*
 			getftype("/home")
 <		Note that a type such as "link" will only be returned on
 		systems that support it.  On some systems only "dir" and
-		"file" are returned.
+		"file" are returned.  On MS-Windows a symbolic link to a
+		directory returns "dir" instead of "link".
 
 							*getline()*
 getline({lnum} [, {end}])
@@ -5893,6 +5897,9 @@ sort({list} [, {func} [, {dict}]])			*sort()* *E702*
 		sorted numerical. This is like 'n' but a string containing
 		digits will be used as the number they represent.
 
+		When {func} is given and it is 'f' then all items will be
+		sorted numerical. All values must be a Number or a Float.
+
 		When {func} is a |Funcref| or a function name, this function
 		is called to compare items.  The function is invoked with two
 		items as argument and must return zero if they are equal, 1 or