* gnat_rm.texi: Fix minor typos. Found while reading the section
	regarding "Bit_Order Clauses" that was sent to a customer.
	Very interesting documentation!

	* sem_case.adb (Choice_Image): Avoid creating improper character
	literal names by using the routine Set_Character_Literal_Name. This
	fixes bombs in certain error message cases.

	* a-reatim.adb: Minor reformatting.

	* sem_ch12.adb (Validate_Derived_Type_Instance): Handle properly the
	case where the formal is an extension of another formal in the current
	unit or in a parent generic unit.

	* s-tposen.adb: Update comments.  Minor reformatting.
	Minor code clean up.

	* s-tarest.adb: Update comments.  Minor code reorganization.

	* exp_attr.adb (Attribute_Tag): Suppress expansion of <type_name>'Tag
	when Java_VM.

	* exp_attr.adb: Minor reformatting

	* sem_ch3.adb (Build_Derived_Private_Type): Refine check to handle
	derivations nested within a child unit: verify that the parent
	type is declared in an outer scope.

	* sem_ch12.adb: Minor reformatting

	* sem_warn.adb (Check_One_Unit): In No_Run_Time mode, do not post
	warning if current unit is a predefined one, from which bodies may
	have been deleted.

	* eval_fat.ads: Add comment that Round_Even is referenced in Ada code
	Fix header format. Add 2001 to copyright date.

	* exp_dbug.adb (Get_Encoded_Name): Fix out of bounds reference,
	which caused CE during compilation if checks were enabled.

From-SVN: r48136