openat2.2: srcfix: semantic newlines and rewrap some long source lines

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man2/openat2.2

@@ -224,7 +224,8 @@ Magic-links are symbolic link-like objects that are most notably found in
 .BR proc (5)
 (examples include
 .IR /proc/[pid]/exe " and " /proc/[pid]/fd/* .)
-Due to the potential danger of unknowingly opening these magic links, it may be
+Due to the potential danger of unknowingly opening these magic links,
+it may be
 preferable for users to disable their resolution entirely (see
 .BR symbolic link (7)
 for more details.)
@@ -437,7 +438,8 @@ may change in the future (with new fields being added when system headers are
 updated), userspace programs should zero-fill
 .I struct open_how
 to ensure that re-compiling the program with new headers will not result in
-spurious errors at runtime. The simplest way is to use a designated
+spurious errors at runtime.
+The simplest way is to use a designated
 initialiser:
 .PP
 .in +4n
@@ -461,8 +463,8 @@ how.resolve = RESOLVE_IN_ROOT;
 If a userspace program wishes to determine what extensions the running kernel
 supports, they may conduct a binary search on
 .IR size
-with a structure which has every byte non-zero (to find the largest value which
-doesn't produce an error of
+with a structure which has every byte non-zero (to find the largest value
+which doesn't produce an error of
 .BR E2BIG .)
 
 .SH SEE ALSO