man page: Improve formatting

Display option names in bold text and argument placeholders in italic
text, as recommended in `man man`.

assets/packaging/micro.1

@@ -3,13 +3,13 @@
 micro \- A modern and intuitive terminal-based text editor
 .SH SYNOPSIS
 .B micro
-.RB [OPTION]...\&
-.RB [FILE]...\&
-.RB [+LINE[:COL]]
+.RI [ OPTION ]...\&
+.RI [ FILE ]...\&
+.RI [+ LINE [: COL ]]
 .br
 .B micro
-.RB [OPTION]...\&
-.RB [FILE[:LINE[:COL]]]...\&
+.RI [ OPTION ]...\&
+.RI [ FILE [: LINE [: COL ]]]...\&
 \& (only if the `parsecursor` option is enabled)
 
 .SH DESCRIPTION
@@ -24,45 +24,47 @@ Use Ctrl-q to quit, Ctrl-s to save, and Ctrl-g to open the in-editor help menu.
 
 .SH OPTIONS
 .PP
-\-clean
+.B \-clean
 .RS 4
 Clean the configuration directory and exit
 .RE
 
 .PP
-\-config-dir dir
+.B \-config-dir
+.I dir
 .RS 4
 Specify a custom location for the configuration directory
 .RE
 
 .PP
-FILE:LINE[:COL] (only if the `parsecursor` option is enabled)
+.IR FILE : LINE [: COL ]
+(only if the `parsecursor` option is enabled)
 .br
-FILE +LINE[:COL]
+.IR FILE \ + LINE [: COL ]
 .RS 4
 Specify a line and column to start the cursor at when opening a buffer
 .RE
 
 .PP
-\-options
+.B \-options
 .RS 4
 Show all options help and exit
 .RE
 
 .PP
-\-debug
+.B \-debug
 .RS 4
 Enable debug mode (enables logging to ./log.txt)
 .RE
 
 .PP
-\-profile
+.B \-profile
 .RS 4
 Enable CPU profiling (writes profile info to ./micro.prof so it can be analyzed later with "go tool pprof micro.prof")
 .RE
 
 .PP
-\-version
+.B \-version
 .RS 4
 Show the version number and information and exit
 .RE
@@ -71,37 +73,41 @@ Micro's plugins can be managed at the command line with the following commands.
 .RS 4
 
 .PP
-\-plugin install [PLUGIN]...
+.B \-plugin install
+.RI [ PLUGIN ]...
 .RS 4
 Install plugin(s)
 .RE
 
 .PP
-\-plugin remove [PLUGIN]...
+.B \-plugin remove
+.RI [ PLUGIN ]...
 .RS 4
 Remove plugin(s)
 .RE
 
 .PP
-\-plugin update [PLUGIN]...
+.B \-plugin update
+.RI [ PLUGIN ]...
 .RS 4
 Update plugin(s) (if no argument is given, updates all plugins)
 .RE
 
 .PP
-\-plugin search [PLUGIN]...
+.B \-plugin search
+.RI [ PLUGIN ]...
 .RS 4
 Search for a plugin
 .RE
 
 .PP
-\-plugin list
+.B \-plugin list
 .RS 4
 List installed plugins
 .RE
 
 .PP
-\-plugin available
+.B \-plugin available
 .RS 4
 List available plugins
 .RE
@@ -113,7 +119,8 @@ file (see 'help options').
 .RS 4
 
 .PP
-\-<option> value
+.BI \-< option >
+.I value
 .RS 4
 Set `option` to `value` for this session.
 .br