move $OFS to prefs article added note about read-only

reference/3.0/Microsoft.PowerShell.Core/About/about_Automatic_Variables.md

@@ -1,5 +1,5 @@
 ---
-ms.date:  2017-11-27
+ms.date:  2017-12-21
 schema:  2.0.0
 locale:  en-us
 keywords:  powershell,cmdlet
@@ -15,6 +15,9 @@ variables are created and maintained by PowerShell.
 
 ## LONG DESCRIPTION
 
+Conceptually, these variables are considered to be read-only.
+Even though they **can** be written to, for backward compatibility they **should not** be written to.
+
 Here is a list of the automatic variables in  PowerShell:
 
 ### $$
@@ -270,50 +273,6 @@ Appointment on Tuesday: Meeting
 Appointment on Friday: Team lunch
 ```
 
-### $OFS
-
-$OFS is a special variable that stores a string that you want to use as an
-output field separator. Use this variable when you are converting an array
-to a string. By default, the value of $OFS is " ", but you can change the
-value of $OFS in your session, by typing `$OFS="<value>"`. If you are
-expecting the default value of " " in your script, module, or configuration
-output, be careful that the $OFS default value has not been changed
-elsewhere in your code.
-
-For example:
-
-```powershell
-$a="1","2","3","4"
-$a
-[string]$a
-$OFS=""
-[string]$a
-$OFS=","
-[string]$a
-$OFS="--PowerShellRocks--";
-[string]$a
-$OFS="`n`n";
-[string]$a
-```
-
-```output
-1
-2
-3
-4
-1 2 3 4
-1234
-1,2,3,4
-1--PowerShellRocks--2--PowerShellRocks--3--PowerShellRocks--4
-1
-
-2
-
-3
-
-4
-```
-
 ### $PID
 
 Contains the process identifier (PID) of the process that is hosting the

reference/3.0/Microsoft.PowerShell.Core/About/about_Preference_Variables.md

@@ -1,5 +1,5 @@
 ---
-ms.date:  2017-12-05
+ms.date:  2017-12-21
 schema:  2.0.0
 locale:  en-us
 keywords:  powershell,cmdlet
@@ -835,7 +835,45 @@ Valid values: Any string.
 Default: Space
 
 By default, the \$OFS variable does not exist and the output file separator is
-a space, but you can add this variable and set it to any string.
+a space, but you can add this variable and set it to any string. You can change
+the value of $OFS in your session, by typing `$OFS="<value>"`. If you are
+expecting the default value of " " in your script, module, or configuration
+output, be careful that the $OFS default value has not been changed elsewhere
+in your code.
+
+For example:
+
+```powershell
+$a="1","2","3","4"
+$a
+[string]$a
+$OFS=""
+[string]$a
+$OFS=","
+[string]$a
+$OFS="--PowerShellRocks--";
+[string]$a
+$OFS="`n`n";
+[string]$a
+```
+
+```output
+1
+2
+3
+4
+1 2 3 4
+1234
+1,2,3,4
+1--PowerShellRocks--2--PowerShellRocks--3--PowerShellRocks--4
+1
+
+2
+
+3
+
+4
+```
 
 ##### EXAMPLES
 

reference/4.0/Microsoft.PowerShell.Core/About/about_Automatic_Variables.md

@@ -1,5 +1,5 @@
 ---
-ms.date:  2017-11-27
+ms.date:  2017-12-21
 schema:  2.0.0
 locale:  en-us
 keywords:  powershell,cmdlet
@@ -15,6 +15,9 @@ variables are created and maintained by PowerShell.
 
 ## LONG DESCRIPTION
 
+Conceptually, these variables are considered to be read-only.
+Even though they **can** be written to, for backward compatibility they **should not** be written to.
+
 Here is a list of the automatic variables in  PowerShell:
 
 ### $$
@@ -270,50 +273,6 @@ Appointment on Tuesday: Meeting
 Appointment on Friday: Team lunch
 ```
 
-### $OFS
-
-$OFS is a special variable that stores a string that you want to use as an
-output field separator. Use this variable when you are converting an array
-to a string. By default, the value of $OFS is " ", but you can change the
-value of $OFS in your session, by typing `$OFS="<value>"`. If you are
-expecting the default value of " " in your script, module, or configuration
-output, be careful that the $OFS default value has not been changed
-elsewhere in your code.
-
-For example:
-
-```powershell
-$a="1","2","3","4"
-$a
-[string]$a
-$OFS=""
-[string]$a
-$OFS=","
-[string]$a
-$OFS="--PowerShellRocks--";
-[string]$a
-$OFS="`n`n";
-[string]$a
-```
-
-```output
-1
-2
-3
-4
-1 2 3 4
-1234
-1,2,3,4
-1--PowerShellRocks--2--PowerShellRocks--3--PowerShellRocks--4
-1
-
-2
-
-3
-
-4
-```
-
 ### $PID
 
 Contains the process identifier (PID) of the process that is hosting the

reference/4.0/Microsoft.PowerShell.Core/About/about_Preference_Variables.md

@@ -1,5 +1,5 @@
 ---
-ms.date:  2017-12-05
+ms.date:  2017-12-21
 schema:  2.0.0
 locale:  en-us
 keywords:  powershell,cmdlet
@@ -835,7 +835,45 @@ Valid values: Any string.
 Default: Space
 
 By default, the \$OFS variable does not exist and the output file separator is
-a space, but you can add this variable and set it to any string.
+a space, but you can add this variable and set it to any string. You can change
+the value of $OFS in your session, by typing `$OFS="<value>"`. If you are
+expecting the default value of " " in your script, module, or configuration
+output, be careful that the $OFS default value has not been changed elsewhere
+in your code.
+
+For example:
+
+```powershell
+$a="1","2","3","4"
+$a
+[string]$a
+$OFS=""
+[string]$a
+$OFS=","
+[string]$a
+$OFS="--PowerShellRocks--";
+[string]$a
+$OFS="`n`n";
+[string]$a
+```
+
+```output
+1
+2
+3
+4
+1 2 3 4
+1234
+1,2,3,4
+1--PowerShellRocks--2--PowerShellRocks--3--PowerShellRocks--4
+1
+
+2
+
+3
+
+4
+```
 
 ##### EXAMPLES
 

reference/5.0/Microsoft.PowerShell.Core/About/about_Automatic_Variables.md

@@ -1,5 +1,5 @@
 ---
-ms.date:  2017-11-27
+ms.date:  2017-12-21
 schema:  2.0.0
 locale:  en-us
 keywords:  powershell,cmdlet
@@ -15,6 +15,9 @@ variables are created and maintained by PowerShell.
 
 ## LONG DESCRIPTION
 
+Conceptually, these variables are considered to be read-only.
+Even though they **can** be written to, for backward compatibility they **should not** be written to.
+
 Here is a list of the automatic variables in  PowerShell:
 
 ### $$
@@ -270,50 +273,6 @@ Appointment on Tuesday: Meeting
 Appointment on Friday: Team lunch
 ```
 
-### $OFS
-
-$OFS is a special variable that stores a string that you want to use as an
-output field separator. Use this variable when you are converting an array
-to a string. By default, the value of $OFS is " ", but you can change the
-value of $OFS in your session, by typing `$OFS="<value>"`. If you are
-expecting the default value of " " in your script, module, or configuration
-output, be careful that the $OFS default value has not been changed
-elsewhere in your code.
-
-For example:
-
-```powershell
-$a="1","2","3","4"
-$a
-[string]$a
-$OFS=""
-[string]$a
-$OFS=","
-[string]$a
-$OFS="--PowerShellRocks--";
-[string]$a
-$OFS="`n`n";
-[string]$a
-```
-
-```output
-1
-2
-3
-4
-1 2 3 4
-1234
-1,2,3,4
-1--PowerShellRocks--2--PowerShellRocks--3--PowerShellRocks--4
-1
-
-2
-
-3
-
-4
-```
-
 ### $PID
 
 Contains the process identifier (PID) of the process that is hosting the

reference/5.0/Microsoft.PowerShell.Core/About/about_Preference_Variables.md

@@ -1,5 +1,5 @@
 ---
-ms.date:  2017-12-05
+ms.date:  2017-12-21
 schema:  2.0.0
 locale:  en-us
 keywords:  powershell,cmdlet
@@ -835,7 +835,45 @@ Valid values: Any string.
 Default: Space
 
 By default, the \$OFS variable does not exist and the output file separator is
-a space, but you can add this variable and set it to any string.
+a space, but you can add this variable and set it to any string. You can change
+the value of $OFS in your session, by typing `$OFS="<value>"`. If you are
+expecting the default value of " " in your script, module, or configuration
+output, be careful that the $OFS default value has not been changed elsewhere
+in your code.
+
+For example:
+
+```powershell
+$a="1","2","3","4"
+$a
+[string]$a
+$OFS=""
+[string]$a
+$OFS=","
+[string]$a
+$OFS="--PowerShellRocks--";
+[string]$a
+$OFS="`n`n";
+[string]$a
+```
+
+```output
+1
+2
+3
+4
+1 2 3 4
+1234
+1,2,3,4
+1--PowerShellRocks--2--PowerShellRocks--3--PowerShellRocks--4
+1
+
+2
+
+3
+
+4
+```
 
 ##### EXAMPLES