[doc] extend.texi copy-editing, 7/N (example markup)

[Sandra Loosemore]

This patch is another installment in my series of copy-edits to the GCC user documentation.  Here I've cleaned up several Texinfo markup issues relating to example environments.  Checked in under the free-for-all write access policy.

-Sandra


2012-11-18  Sandra Loosemore  <sandra@codesourcery.com>

	gcc/
	* doc/extend.texi: Use @smallexample consistently.  Add @noindent
	when continuing a sentence or paragraph past an example.  Change
	tabs to spaces in examples.

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