message catalogs: fix comment lines, also remove linux hack in merge.c

According to the spec, blank lines in message catalogs or lines
beginning with '$ ' are valid comments.

However, there were many cases where lines in the message catalogs
contained just a single '$', without the required space after it.

Under linux, this caused 126766 error lines (in my builds) of the
form:

... unknown directive `': line ignored

This also causes gencat to exit with a non-0 exit code.  Even though
gencat says it ignores the line, it really doesn't.

An early porting change to programs/localized/util/merge.c was made to
ignore this return value on linux.  This hack has now been removed.

Build logs are a lot smaller and cleaner now.

cde/programs/dtcreate/dtcreate.msg

@@ -1,19 +1,19 @@
 $ $TOG: dtcreate.msg /main/4 1999/09/17 17:21:36 mgreess $
 $ %Z%%M%        %I%  %W% %G% %U%
-$
+$ 
 $   COMPONENT_NAME: dtcreate
-$
+$ 
 $   FUNCTIONS: none
-$
+$ 
 $   ORIGINS: 27
-$
-$
+$ 
+$ 
 $   (C) COPYRIGHT International Business Machines Corp. 1993
 $   All Rights Reserved
 $   Licensed Materials - Property of IBM
 $   US Government Users Restricted Rights - Use, duplication or
 $   disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
-$
+$ 
 $ **   Description:
 $ **   ------------
 $ **   This is the source message catalog file for dtcreate.
@@ -106,98 +106,98 @@ $ **
 $ *****************************************************************************
 10 The Action Name is missing.\n\
 Please enter a name in the 'Action Name' field.
-$
+$ 
 15 The execute command is missing.\n\
 Please enter a command in the\n\
 'Command When Action Is Opened (Double-clicked)' field.
-$
+$ 
 20 The 'Datatypes That Use This Action' list is empty.\n\
 You have selected 'Only Above List' in the\n\
 'Dropable Datatypes' field.\n\
 Change the Dropable Datatype choice to 'All Datatypes'\n\
 or add at least one datatype to the list.
-$
+$ 
 25 An action and datatype definition file already exists\n\
 with this Action Name.\n\
 You can cancel the Save and change your Action Name\n\
 or you can overwrite the existing definition file.\n\
 Do you wish to overwrite the existing definition file?
-$
+$ 
 30 A variable name is missing in the\n\
 'Command When Action Is Opened (Double-clicked)' field.\n\
 Add a variable name for the label you have entered\n\
 in the 'When Action Opens, Ask Users for' field.\n\
 Valid variable names are $*, $1, $2, ..., $9.
-$
+$ 
 35 These changes have not been saved.\n\
 Do you wish to save these changes before you Exit?
-$
+$ 
 40 The current changes have not been saved.\n\
 Do you want to save this action before clearing\n\
 the fields for a New action?
-$
+$ 
 45 The current changes have not been saved.\n\
 Do you want to save these changes before clearing\n\
 the fields to load another action definition file?
-$
+$ 
 50 The Action Name contains one or more illegal\n\
 characters.\n\
 The following characters should not be used in a name:\n\
   / \ " ' ;  (  ) ~ ! $ { } < > # @ | &
-$
+$ 
 55 Could not create the following file:
-$
+$ 
 60 Could not open the following file:
-$
+$ 
 65 Could not load the following file because it was\n\
 not originally created by the Create Action tool:
-$
+$ 
 66 Could not load the file because it has been altered by some\n\
 other means other than Create Action.  This could have been caused\n\
 by modifying the file with a text editor or some other tool.
-$
+$ 
 67 Create Action can only edit files that were created\n\
 and edited by Create Action.
-$
+$ 
 68 Could not load the following file:
-$
+$ 
 $  The following messages are all part of the same message dialog
 70 The new action
 71 has been placed in your home folder.
 73 The action definition file that was created is called:
-$
+$ 
 80 Could not find all of the sizes of the icon\n\
 you have selected.
-$
+$ 
 85 Could not start the Icon Editor.
-$
+$ 
 90 Could not parse the following file:
-$
+$ 
 95 Could not find the following icon file within the icon\n\
 search path.
-$
+$ 
 98 The icon you have selected is not in the icon search path.\n\
 You must move the icon to a directory in the icon search\n\
 path so that the icon will be displayed properly within desktop\n\
 environment.\n\
 Select 'Ok' if you want to use this icon.\n\
 Select 'Cancel' if you want to select a different icon.
-$
+$ 
 $ ONLY TRANSLATE  "Usage"  and  "filename"
 110 Usage: dtcreate [<filename>] [-?]
-$
+$ 
 120 You have not selected a Datatype from the\n\
 'Datatypes That Use This Action' list.
 125 Please select the Datatype you would like to Delete.
 130 Please select the Datatype you would like to Edit.
-$
+$ 
 150 Your current work has not been saved.
 152 Don't Save
 154 Cancel Close
-$
+$ 
 160 Could not save session to file:
 162 Could not restore session from file:
-$
+$ 
 $ TRANSLATORS: DO NOT TRANSLATE the word "HOME" in the following message
 170 The HOME environment variable is not set.\n\
 The HOME environment variable must be set in order\n\
@@ -250,17 +250,17 @@ $ **
 $ *****************************************************************************
 10 The Datatype Family Name is missing.\n\
 Enter a name in the 'Name of Datatype Family' field.
-$
+$ 
 15 The Identifying Characteristics are missing.\n\
 You must specify the characteristics before the datatype\n\
 can be created. Select the Edit button next to the\n\
 Identifying Characteristics list to specify the characteristics.
-$
+$ 
 20 The 'Name of Datatype Family' field contains one or more\n\
 illegal characters.\n\
 The following characters should not be used in a name:\n\
   / \ " ' ;  (  ) ~ ! $ { } < > # @ | &
-$
+$ 
 25 A Datatype Family with this name already exists.\n\
 Please change the name in the 'Name of Datatype Family'\n\
 field.
@@ -306,38 +306,38 @@ $ *****************************************************************************
 10 Name Pattern is missing.\n\
 If Name Pattern is selected, a name pattern\n\
 must be entered.
-$
+$ 
 15 Permissions choice is missing.\n\
 If Permission Pattern is selected, one or\n\
 more of the choices under Permission\n\
 Pattern must be selected.
-$
+$ 
 20 Contents Pattern is missing.\n\
 If Contents is selected, then the Pattern field\n\
 under Contents must be filled in.
-$
+$ 
 25 Start byte value is missing.\n\
 If Contents is selected, then a number must be\n\
 entered in the 'Start Byte' field.
-$
+$ 
 30 An identifying characteristic has not been selected.\n\
 Select one or more of the characteristics\n\
 (Name Pattern, Permissions Pattern, or Contents).
-$
+$ 
 45 The Name Pattern contains one or more illegal\n\
 characters.\n\
 The following characters should not be used in\n\
 a Name Pattern:\n\
   / \ " ' ;  (  ) ~ ! $ { } < > # @ | &
-$
+$ 
 46 The Contents Pattern does not match the format for\n\
 the contents Type you have selected.\n\
 Retype the Contents Pattern in the correct format or\n\
 change the Type so that it matches the Contents Pattern.
-$
+$ 
 47 The Start Byte field contains illegal characters.\n\
 This field can only accept numbers in a decimal format.
-$
+$ 
 48 Using the Contents Pattern may significantly slow\n\
 down your File Manager performance.\n\
 When Contents Pattern is used, the File Manager must\n\