basic_string.h (erase(size_type, size_type), [...]): Call _M_replace_safe instead, thus avoiding redundant check for length_error.

2004-01-25  Paolo Carlini  <pcarlini@suse.de>

	* include/bits/basic_string.h (erase(size_type, size_type),
	erase(iterator), erase(iterator, iterator)): Call _M_replace_safe
	instead, thus avoiding redundant check for length_error.

	* include/bits/basic_string.h: Tweak some comments.

From-SVN: r76550