bug#1351: 23.0.60; Provide doc strings for functions in replace.el

[Drew Adams]

Please provide a doc string for these functions. At the very least,
provide a comment for each explaining what it does and what its
arguments are.
 
query-replace-descr
query-replace-read-args
occur-mode-find-occurrence
occur-find-match
occur-accumulate-lines
occur-read-primary-args
occur-1
occur-engine-add-prefix
occur-engine
occur-context-lines (has a comment)
replace-eval-replacement
replace-loop-through-replacements (has a comment)
replace-highlight
replace-dehighlight
 

Likewise, for these variables:
 
query-replace-history
replace-overlay
 
 
 
In GNU Emacs 23.0.60.1 (i386-mingw-nt5.1.2600)
 of 2008-11-08 on LENNART-69DE564
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --no-opt --cflags -Ic:/g/include
-fno-crossjumping'