[9front] typos in gefs(8)

[Afshin Min <amin@firemail.cc>]

Incomplete phrase here:

> .TP
> .B -S
> Disables automatic snapshots.
> .I old
> and gives it the name
> .IR new .

Others in the diff:

diff 2d63bdbb4416a8328f42db44d3b6d4da04303e17 uncommitted
--- a/sys/man/8/gefs
+++ b/sys/man/8/gefs
@@ -105,7 +105,7 @@
 .TP
 .BI "-d " snap
 Deletes a snapshot, reclaiming whatever space is not shared
-is not shared with other snapshots.
+with other snapshots.
 .TP
 .B -m
 Flags that the newly created snapshot should be mutable.
@@ -130,12 +130,12 @@
 Snapshots are independent views of a filesystem hierarchy.
 A snapshot may be mutable or immutable.
 Mutable snapshots can be mounted and written to,
-Immutable snapshots are a view of a file system hierarchy at a point im time.
+immutable snapshots are a view of a file system hierarchy at a point im time.
 They are referred to by name, and are selected at mount time with an attach spec.
 When the attach spec starts with the
 .B %
 sigil, a snapshot is mounted in permissive mode.
-This allows the mounting user to bypass normal file system permission checks.'
+This allows the mounting user to bypass normal file system permission checks.
 In order to mount a snapshot in permissive mode, the mounting user must be in the
 .I adm
 group.
@@ -148,7 +148,7 @@
 .I dump:
 This is the name used to mount a list of all snapshots.
 Each snapshot in the file system will be listed in a directory.
-.IP
+.TP
 .I empty:
 This is a read-only empty snapshot.
 It contains no files or directories.