@code{nil}, case is always significant in all searches.
@vindex case-replace
- In addition, when the @var{newstring} argument is all or partly lower
-case, replacement commands try to preserve the case pattern of each
-occurrence. Thus, the command
+ In addition, when the second argument of a replace command is all or
+partly lower case, replacement commands try to preserve the case
+pattern of each occurrence. Thus, the command
@example
M-x replace-string @key{RET} foo @key{RET} bar @key{RET}