Typos

https://winscp.net/forum/viewtopic.php?t=26299
(cherry picked from commit 7c7377288780b3c2f12da733eb89378d46f1cecb)

Source commit: ec3b962cc96f09a3ff153d59035c66f1a44334f2

source/resource/TextsWin1.rc

@@ -121,7 +121,7 @@ BEGIN
         EXIT_ON_COMPLETION, "%s\n\nDo you want to close application?"
         DISCONNECT_ON_COMPLETION, "%%s\n\nDo you want to terminate %d remaining session(s) and close the application?"
         PENDING_QUEUE_ITEMS2, "**There are still some background transfers in queue. Do you want to disconnect anyway?**\n \nWarning: Pressing 'OK' will terminate all transfers immediately."
-        PERFORM_ON_COMMAND_SESSION2, "**Do you want to open separate shell session?**\n\nCurrent %s session does not support command you request. Separate shell session may be opened to process the command.\n \nNote: The server must provide Unix-like shell and the shell must use same path syntax as current %s session."
+        PERFORM_ON_COMMAND_SESSION2, "**Do you want to open a separate shell session?**\n\nCurrent %s session does not support command you request. A separate shell session may be opened to process the command.\n \nNote: The server must provide Unix-like shell and the shell must use same path syntax as current %s session."
         PENDING_EDITORS, "There are some opened files. Please close them before exiting application.\n \nBeware: If you ignore this message, opened files may remain in temporary directory."
         CLEANTEMP_CONFIRM2, "**Do you want to delete past temporary folders?**\n\nWinSCP has found %d temporary folders, which it has probably created in past. These folders may contain files previously edited or downloaded.\n\nYou may also open the folders to review their content and to delete them yourself."
         OPEN_BUTTON, "&Open"
@@ -456,7 +456,7 @@ BEGIN
         LOGIN_NEW_SESSION_FOLDER_CAPTION, "Create Site Folder"
         LOGIN_NEW_SESSION_FOLDER_PROMPT, "New folder name:"
         ABOUT_REGISTRATION_LINK, "How to purchase a license..."
-        REMOTE_COPY_COMMAND_SESSION2, "**Do you want to open separate shell session to duplicate the file(s)?**\n \nCurrent session does not support direct duplication of remote files. Separate shell session may be opened to process the duplication. Alternatively your may duplicate the file(s) via local temporary copy."
+        REMOTE_COPY_COMMAND_SESSION2, "**Do you want to open a separate shell session to duplicate the file(s)?**\n \nCurrent session does not support direct duplication of remote files. A separate shell session may be opened to process the duplication. Alternatively you may duplicate the file(s) via local temporary copy."
         EDITOR_AD_HOC, "Editor"
         FILE_INFO_HIDDEN2, "%s hidden"
         FILE_INFO_FILTERED2, "%s filtered"