Fix documentation on tcl_wordchars/tcl_nonwordchars

doc/tclvars.n

@@ -75,11 +75,11 @@ The following elements of \fBenv\fR are special to Tcl:
 \fBenv(HOME)\fR
 .
 This environment variable, if set, gives the location of the directory
-considered to be the current user's home directory, and to which a
-call of \fBcd\fR without arguments or with just
-.QW ~
-as an argument will change into. Most platforms set this correctly by
-default; it does not normally need to be set by user code.
+considered to be the current user's home directory. The value of this variable
+is returned by the \fBfile home\fR command. Most platforms set this correctly by
+default; it does not normally need to be set by user code. On Windows, if not
+already set, it is set to the value of the \fBUSERPROFILE\fR environment
+variable.
 .TP
 \fBenv(TCL_LIBRARY)\fR
 .
@@ -458,22 +458,16 @@ This variable and functionality only exist if
 The value of this variable is a regular expression that can be set to
 control what are considered
 .QW word
-characters, for instances like
-selecting a word by double-clicking in text in Tk.  It is platform
-dependent.  On Windows, it defaults to \fB\eS\fR, meaning anything
-but a Unicode space character.  Otherwise it defaults to \fB\ew\fR,
-which is any Unicode word character (number, letter, or underscore).
+characters.  It defaults to \fB\ew\fR, which is any Unicode
+word character (number, letter, or underscore).
 .\" VARIABLE: tcl_nonwordchars
 .TP
 \fBtcl_nonwordchars\fR
 .
 The value of this variable is a regular expression that can be set to
 control what are considered
 .QW non-word
-characters, for instances like
-selecting a word by double-clicking in text in Tk.  It is platform
-dependent.  On Windows, it defaults to \fB\es\fR, meaning any Unicode space
-character.  Otherwise it defaults to \fB\eW\fR, which is anything but a
+characters.  It defaults to \fB\eW\fR, which is anything but a
 Unicode word character (number, letter, or underscore).
 .\" VARIABLE: tcl_version
 .TP