[man] Add italics (#3097)

man/man1/fzf-tmux.1

@@ -27,7 +27,7 @@ THE SOFTWARE.
 fzf\-tmux - open fzf in tmux split pane
 
 .SH SYNOPSIS
-.B fzf\-tmux [LAYOUT OPTIONS] [\-\-] [FZF OPTIONS]
+.B fzf\-tmux [\fILAYOUT OPTIONS\fR] [\-\-] [\fIFZF OPTIONS\fR]
 
 .SH DESCRIPTION
 fzf\-tmux is a wrapper script for fzf that opens fzf in a tmux split pane or in

man/man1/fzf.1

@@ -27,7 +27,7 @@ THE SOFTWARE.
 fzf - a command-line fuzzy finder
 
 .SH SYNOPSIS
-fzf [options]
+fzf [\fIoptions\fR]
 
 .SH DESCRIPTION
 fzf is an interactive filter program for any kind of list.