docs: proc: fix minor grammar and formatting issues

Fix missing "from" in "prevent <pid> being reused" and
add spacing in vm_area_struct range notation for readability.

No functional changes.

Signed-off-by: Myro Demma <myro@myromyro.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260428133001.11384-1-myro@myromyro.com>

Documentation/filesystems/proc.rst

@@ -118,7 +118,7 @@ PTRACE_MODE_ATTACH permissions; CAP_PERFMON capability does not grant access
 to /proc/PID/mem for other processes.
 
 Note that an open file descriptor to /proc/<pid> or to any of its
-contained files or subdirectories does not prevent <pid> being reused
+contained files or subdirectories does not prevent <pid> from being reused
 for some other process in the event that <pid> exits. Operations on
 open /proc/<pid> file descriptors corresponding to dead processes
 never act on any new process that the kernel may, through chance, have
@@ -2211,7 +2211,7 @@ the process is maintaining.  Example output::
      | lr-------- 1 root root 64 Jan 27 11:24 400000-41a000 -> /usr/bin/ls
 
 The name of a link represents the virtual memory bounds of a mapping, i.e.
-vm_area_struct::vm_start-vm_area_struct::vm_end.
+vm_area_struct::vm_start - vm_area_struct::vm_end.
 
 The main purpose of the map_files is to retrieve a set of memory mapped
 files in a fast way instead of parsing /proc/<pid>/maps or