Fix a couple of typos and formatting issues

stand/defaults/loader.conf.5

@@ -23,7 +23,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\" $FreeBSD$
-.Dd Januar 6, 2020
+.Dd January 6, 2020
 .Dt LOADER.CONF 5
 .Os
 .Sh NAME
@@ -193,7 +193,7 @@ special value
 which aborts the bootstrap process, use of this setting should be avoided.
 .El
 .Pp
-.Em WARNING:
+.Em WARNING :
 developers should never use these suffixes for any kernel environment
 variables (tunables) or conflicts will result.
 .Sh DEFAULT SETTINGS
@@ -242,12 +242,16 @@ Set font size for framebuffer mode.
 Default font size is selected based on screen resolution, to achieve
 terminal dimensions 80x24.
 .It Va screen.textmode
-Value "0" will trigger BIOS loader to switch to use VESA BIOS Extension (VBE)
+Value
+.Dq 0
+will trigger BIOS loader to switch to use VESA BIOS Extension (VBE)
 frame buffer mode for console.
 The same effect can be achieved by setting
 .Va vbe_max_resolution .
 .Pp
-Value "1" will force BIOS loader to use VGA text mode.
+Value
+.Dq 1
+will force BIOS loader to use VGA text mode.
 .Pp
 If
 .Va vbe_max_resolution
@@ -377,7 +381,7 @@ It is not available in the default Forth-based loader.
 .Sh FILES
 .Bl -tag -width /boot/defaults/loader.conf -compact
 .It Pa /boot/defaults/loader.conf
-default settings -- do not change this file.
+default settings \(em do not change this file.
 .It Pa /boot/loader.conf
 user defined settings.
 .It Pa /boot/loader.conf.local
@@ -403,7 +407,7 @@ The
 stops reading
 .Nm
 when it encounters a syntax error, so any options which are vital for
-booting a particular system (i.e.\&
+booting a particular system (i.e.,
 .Dq Va hw.ata.ata_dma Ns "=0" )
 should precede any experimental additions to
 .Nm .