Add docs for fileglob support in remark(1)

Closes GH-120.

Author: wooorm

doc/remark.1.md

@@ -2,12 +2,17 @@
 
 ## SYNOPSIS
 
-`remark` \[`options`] <_file|dir_ _..._>
+`remark` \[`options`] <_pathspec_...>
 
 ## DESCRIPTION
 
 **remark** is a markdown processor powered by plugins.
 
+<_pathspec_...> refers to files to process.  Fileglobs (e.g., `*.md`)
+can be given to add all matching files.  Directories can be given (e.g. `dir`
+to add `dir/readme.md` and `dir/sub/history.mkd`) to add files with a known
+markdown extension (see the `-e`, `--ext` flag).
+
 Logs verbose debugging information when `$DEBUG` is set to `"*"`.
 
 ## OPTIONS

lib/cli/cli.js

@@ -229,7 +229,7 @@ function help() {
 var program = new Command(pack.name)
     .version(pack.version)
     .description(pack.description)
-    .usage('[options] <file|dir ...>')
+    .usage('[options] <pathspec...>')
     .option('-o, --output [path]', 'specify output location')
     .option('-c, --config-path <path>', 'specify configuration location')
     .option('-i, --ignore-path <path>', 'specify ignore location')

man/remark.1

@@ -3,11 +3,13 @@
 \fBremark\fR - Markdown processor
 .SH "SYNOPSIS"
 .P
-\fBremark\fR \[lB]\fBoptions\fR\[rB] <\fIfile\[ba]dir\fR \fI...\fR>
+\fBremark\fR \[lB]\fBoptions\fR\[rB] <\fIpathspec\fR...>
 .SH "DESCRIPTION"
 .P
 \fBremark\fR is a markdown processor powered by plugins.
 .P
+<\fIpathspec\fR...> refers to files to process. Fileglobs (e.g., \fB*.md\fR) can be given to add all matching files. Directories can be given (e.g. \fBdir\fR to add \fBdir\[sl]readme.md\fR and \fBdir\[sl]sub\[sl]history.mkd\fR) to add files with a known markdown extension (see the \fB-e\fR, \fB--ext\fR flag).
+.P
 Logs verbose debugging information when \fB\[Do]DEBUG\fR is set to \fB\[dq]*\[dq]\fR.
 .SH "OPTIONS"
 .SS "\fB-h\fR, \fB--help\fR"

readme.md

@@ -180,7 +180,7 @@ npm install --global remark
 Use:
 
 ```text
-Usage: remark [options] <file|dir ...>
+Usage: remark [options] <pathspec...>
 
 Markdown processor powered by plugins