doc: afs_compile_et formatting fixes

Fix two pod formatting errors and remove one trailing
whitespace characters.

Change-Id: I2ba4fd56afb8c26591d2770301c3edfdd1a898fb
Reviewed-on: http://gerrit.openafs.org/10719
Reviewed-by: Ken Dreyer <ktdreyer@ktdreyer.com>
Tested-by: Ken Dreyer <ktdreyer@ktdreyer.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
doc: afs_compile_et -lang short form

Document the -lang short form for -language.

Change-Id: I4a57bdb23ca5fab4e1565d7e930cdc10097a7414
Reviewed-on: http://gerrit.openafs.org/10720
Reviewed-by: Ken Dreyer <ktdreyer@ktdreyer.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>