doc for catch & throw should not mention "tag"

[Drew Adams]

The doc strings and the Emacs Lisp-manual doc for `catch' and `throw'
currently refer to the catch target as the "tag".  Because of possible
confusion with tags files, and to let searching the manual for "\btag"
find only occurrences that involve tag files, the doc for `catch' and
`throw' should call the target something like "target" or "label"
instead of "tag".


In GNU Emacs 22.0.50.1 (i386-mingw-nt5.1.2600)
 of 2006-03-20 on W2ONE
X server distributor `Microsoft Corp.', version 5.1.2600
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