docs: Follow man-pages(7) suggestions for SYNOPSIS

man-pages(7) has [1]:

> For commands, this shows the syntax of the command and its arguments
> (including options); boldface is used for as-is text and italics are
> used to indicate replaceable arguments. Brackets ([]) surround
> optional arguments, vertical bars (|) separate choices, and ellipses
> (...) can be repeated.

I've adjusted our SYNOPSIS entries to match that formatting, and
generally tried to make them more consistent with the precedent set by
the man-pages project.  Outside of the SYNOPSIS entry, I prefer using
backticks for literals, although in some places I've left the **
bolding to keep things visually similar to a nearby SYNOPSIS entry.

[1]: http://man7.org/linux/man-pages/man7/man-pages.7.html

Signed-off-by: W. Trevor King <wking@tremily.us>

Closes: #1027
Approved by: rhatdan

1 files changed, 6 insertions, 5 deletions

diff --git a/docs/podman-export.1.md b/docs/podman-export.1.md
index 92811b43e..6029beeb5 100644
--- a/docs/podman-export.1.md
+++ b/docs/podman-export.1.md
@@ -4,15 +4,12 @@
 podman export - Export container's filesystem contents as a tar archive
 
 ## SYNOPSIS
-**podman export**
-**CONTAINER**
-[**--output**|**-o**]
-[**--help**|**-h**]
+**podman export** [*options*] *container*
 
 ## DESCRIPTION
 **podman export** exports the filesystem of a container and saves it as a tarball
 on the local machine. **podman export** writes to STDOUT by default and can be
-redirected to a file using the **output flag**.
+redirected to a file using the `--output` flag.
 Note: `:` is a restricted character and cannot be part of the file name.
 
 **podman [GLOBAL OPTIONS]**
@@ -27,6 +24,10 @@ Note: `:` is a restricted character and cannot be part of the file name.
 
 Write to a file, default is STDOUT
 
+**--help**, **-h**
+
+Print usage statement
+
 ## EXAMPLES
 
 ```