Fix typos all around (thanks codespell!)

man/weston-debug.man

@@ -13,7 +13,7 @@ debug messages from the compositor. The debug messages are categorized into diff
 debug streams by the compositor (example: logs, proto, list, etc.,) and the compositor
 requires a file descriptor to stream the messages.
 
-This tool accepts a file name or a file desciptor (not both) and any desired debug stream
+This tool accepts a file name or a file descriptor (not both) and any desired debug stream
 names from the user as command line arguments and subscribes the desired streams from the
 compositor by using the weston_debug_v1 interface. After the subscription, the
 compositor will start to write the debug messages to the shared file descriptor.

man/weston-drm.man

@@ -93,7 +93,7 @@ in user-mode (drmModeModeInfo) flag bits 19-22. For the non-CEA modes a value of
 Each CEA-mode is identified by a unique, Video Identification Code (VIC).
 For example, VIC=4 is 1280x720@60 aspect-ratio 16:9. This mode will be
 different than a non-CEA mode 1280x720@60 0:0. When the video mode
-1280x720@60 0:0 is applied, since its timing doesnt exactly match with the CEA
+1280x720@60 0:0 is applied, since its timing doesn't exactly match with the CEA
 information for VIC=4, it would be treated as a non-CEA mode. Also, while setting
 the HDMI-AVI-Inforframe, VIC parameter will be given as '0'. If video mode
 1280x720@60 16:9 is applied, its CEA timimgs matches with that of video mode with
@@ -192,7 +192,7 @@ status. For example, use
 Use graphics and input devices designated for seat
 .I seatid
 instead of the seat defined in the environment variable
-.BR XDG_SEAT ". If neither is specifed, seat0 will be assumed."
+.BR XDG_SEAT ". If neither is specified, seat0 will be assumed."
 .TP
 \fB\-\-tty\fR=\fIx\fR
 Launch Weston on tty