[Ada] Various typo corrections plus minor reformatting

[Ada] Various typo corrections plus minor reformatting

2020-06-17  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

	* exp_ch3.ads (Build_Access_Subprogram_Wrapper_Body): Adjust
	colon columns; reformat comment.
	* exp_ch3.adb
	(Build_Access_Subprogram_Wrapper_Body): Likewise.
	* sem_ch3.adb (Build_Access_Subprogram_Wrapper): Reformat spec
	comment and reformat comment in body.
	(Analyze_Full_Type_Declaration): Reformat comment.
	(Replace_Type_Name): Fixed three typos, plus reformatting of
	comment.
	* sem_prag.adb (Analyze_Pre_Post_Condition): Fix typos.
	* sem_warn.adb (Warn_On_Overlapping_Actuals): Edit comments:
	remove hyphen, add missing word.