quote is used to specify a literal string (one that is not
interpreted for shell variables or quoting with a backslash [see
next paragraph]), while double quotes indicate a string which
-should be evaluated. For example, backquotes are evaluated inside of
+should be evaluated. For example, backticks are evaluated inside of
double quotes, but not single quotes.
.PP
\fB\(rs\fP quotes the next character, just as in shells such as bash and zsh.
.PP
It is also possible to substitute the output of a Unix command in an
initialization file. This is accomplished by enclosing the command
-in backquotes (\fB`\fP\fIcommand\fP\fB`\fP).
+in backticks (\fB`\fP\fIcommand\fP\fB`\fP).
.PP
UNIX environment variables can be accessed like the way it is done in shells
like sh and bash: Prepend the name of the variable by a dollar
however the special character \fB*\fP can be used to empty a group of all of
its contents.
.IP
-These address groups can also be created implicitely by the \fBalias\fP, \fBlists\fP,
+These address groups can also be created implicitly by the \fBalias\fP, \fBlists\fP,
\fBsubscribe\fP and \fBalternates\fP commands by specifying the optional \fI-group\fP
option.
.IP
.fi
.IP
If your terminal supports color, these commands can be used to
-assign \fIforeground\fP/\fIbackgound\fP combinations to certain
+assign \fIforeground\fP/\fIbackground\fP combinations to certain
objects. Valid objects are:
.BR attachment ", " body ", " bold ", " header ", "
.BR hdrdefault ", " index ", " indicator ", " markers ", "
.fi
.IP
These commands are used to set and manipulate configuration
-varibles.
+variables.
.IP
Mutt knows four basic types of variables: boolean, number, string
and quadoption. Boolean variables can be \fBset\fP (true),
cryptographically verified messages
.TP
~x \fIEXPR\fP
-messages which contain \fIEXPR\fP in the \(lqReferences\(rq field
+messages which contain \fIEXPR\fP in the \(lqReferences\(rq or \(lqIn-Reply-To\(rq field
.TP
~X \fIMIN\fP-\fIMAX\fP
messages with MIN - MAX attachments
duplicated messages (see $duplicate_threads)
.TP
~$
-unreferenced message (requries threaded view)
+unreferenced message (requires threaded view)
.TP
~(PATTERN)
messages in threads containing messages matching a certain pattern, e.g. all threads containing messages from you: ~(~P)
.PP
In the above, \fIEXPR\fP is a regular expression.
.PP
-With the \fB~m\fP, \fB~n\fP, \fB~X\fP, and \fB~z\fP operators, you can also
+With the \fB~d\fP, \fB~m\fP, \fB~n\fP, \fB~r\fP, \fB~X\fP, and \fB~z\fP operators, you can also
specify ranges in the forms \fB<\fP\fIMAX\fP, \fB>\fP\fIMIN\fP,
\fIMIN\fP\fB-\fP, and \fB-\fP\fIMAX\fP.
+.PP
+With the \fB~z\fP operator, the suffixes \(lqK\(rq and \(lqM\(rq are allowed to specify
+kilobyte and megabyte respectively.
.SS Matching dates
.PP
The \fB~d\fP and \fB~r\fP operators are used to match date ranges,