Split large string section; add truncation advice

* manual/examples/strncat.c: Remove.
This example was misleading, as the code would have undefined
behavior if "hello" was longer than SIZE.  Anyway, the manual
shouldn't encourage strncpy+strncat for this sort of thing.
* manual/string.texi (Copying Strings and Arrays): Split into
three sections Copying Strings and Arrays, Concatenating Strings,
and Truncating Strings, as this section was way too long.  All
cross-referenced changed.  Add advice about string-truncation
functions.  Remove misleading strncat example.

1 files changed, 1 insertions, 1 deletions

diff --git a/manual/memory.texi b/manual/memory.texi
index cea2cd7ba7..700555ed46 100644
--- a/manual/memory.texi
+++ b/manual/memory.texi
@@ -547,7 +547,7 @@ The contents of the block are undefined; you must initialize it yourself
 Normally you would cast the value as a pointer to the kind of object
 that you want to store in the block.  Here we show an example of doing
 so, and of initializing the space with zeros using the library function
-@code{memset} (@pxref{Copying and Concatenation}):
+@code{memset} (@pxref{Copying Strings and Arrays}):
 
 @smallexample
 struct foo *ptr;