query-replace is an interactive compiled Lisp function in `replace.el'.

It is bound to M-%, <menu-bar> <edit> <replace> <query-replace>.


Replace some occurrences of FROM-STRING with TO-STRING.
As each match is found, the user must type a character saying
what to do with it. For directions, type C-h at that time.

In Transient Mark mode, if the mark is active, operate on the contents
of the region. Otherwise, operate from point to the end of the buffer.

Use M-n to pull the last incremental search string to the minibuffer
that reads FROM-STRING, or invoke replacements from
incremental search with a key sequence like `C-s C-s M-%'
to use its current search string as the string to replace.

Matching is independent of case if `case-fold-search' is non-nil and
FROM-STRING has no uppercase letters. Replacement transfers the case
pattern of the old text to the new text, if `case-replace' and
`case-fold-search' are non-nil and FROM-STRING has no uppercase
letters. (Transferring the case pattern means that if the old text
matched is all caps, or capitalized, then its replacement is upcased
or capitalized.)

Ignore read-only matches if `query-replace-skip-read-only' is non-nil,
ignore hidden matches if `search-invisible' is nil, and ignore more
matches using `isearch-filter-predicate'.

If `replace-lax-whitespace' is non-nil, a space or spaces in the string
to be replaced will match a sequence of whitespace chars defined by the
regexp in `search-whitespace-regexp'.

Third arg DELIMITED (prefix arg if interactive), if non-nil, means replace
only matches surrounded by word boundaries. A negative prefix arg means
replace backward.

Fourth and fifth arg START and END specify the region to operate on.

To customize possible responses, change the bindings in `query-replace-map'.