[Ada] Documentation updates

[Arnaud Charlet <charlet at adacore dot com>]

Tested on i686-linux, committed on HEAD

Update documentation, e.g. document that bounds of result of Base_Name match
the input index positions.

2005-09-01  Robert Dewar  <dewar@adacore.com>
	    Arnaud Charlet  <charlet@adacore.com>

	* g-dirope.ads: Minor reformatting
	Document that bounds of result of Base_Name match the input index
	positions.
	Add documentation on environment variable syntax for Expand_Path

	* gnat_ugn.texi: Update documentation to include mention of -m switches
	Document new treatment of wide characters in max line length
	style check.
	Remove -gnatL/-gnatZ switches, no longer used.
	Add note on pragmas Assertion_Policy and Debug_Policy in discussion
	of -gnata switch.

	* gnat_rm.texi: Add doc for two argument form of pragma
	Float_Representation.
	Add documentation for pragma No_Strict_Aliasing
	Add note that explicit component clause overrides pragma Pack.
	Add documentation of pragma Debug_Policy

Attachment: difs.45
Description: Text document