diff, log doc: say "patch text" instead of "patches"

diff, log doc: say "patch text" instead of "patches"

diff, log doc: say "patch text" instead of "patches"

A poster on Stackoverflow was confused that the documentation of git-log
promised to generate "patches" or "patch files" with -p, but there were
none to be found. Rewrite the corresponding paragraph to talk about
"patch text" to avoid the confusion.

Shorten the language to say "X does Y" in place of "X does not Z, but Y".

Cross-reference the referred-to commands like the rest of the file does.

Enumerate git-show because it includes the description as well.

Mention porcelain commands before plumbing commands because I guess that
the paragraph is read more frequently in their context.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Acked-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>