prj-dect.adb (Parse): Rename parameter Modifying to Extends.

prj-dect.adb (Parse): Rename parameter Modifying to Extends.

	* prj-dect.adb (Parse): Rename parameter Modifying to Extends.

	* prj-dect.ads (Parse): Rename parameter Modifying to Extends.

	* prj-env.adb: Minor comment changes (modifying -> extends).

	* prj-nmsc.adb: Minor comment changes (modifying -> extends).

	* prj-part.adb (Parse_Single_Project): Change Tok_Modifying to
	Tok_Extends.

	* prj.adb (Initialize): Change Modifying to Extends.

	* scans.ads (Token_Type): Change Tok_Modifying to Tok_Extends.

	* prj.ads: Minor comment change (Modifying -> extending).

	* snames.ads: Change modifying to extends.

From-SVN: r47679