docs: fix getroute manpage rendering

My manpage viewer did not know what to do with curly braces,
so I switched them to quotes and it works fine.

Signed-off-by: Mark Beckwith <wythe@intrig.com>

doc/lightning-getroute.7

@@ -2,12 +2,12 @@
 .\"     Title: lightning-getroute
 .\"    Author: [see the "AUTHOR" section]
 .\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
-.\"      Date: 12/17/2018
+.\"      Date: 01/23/2019
 .\"    Manual: \ \&
 .\"    Source: \ \&
 .\"  Language: English
 .\"
-.TH "LIGHTNING\-GETROUTE" "7" "12/17/2018" "\ \&" "\ \&"
+.TH "LIGHTNING\-GETROUTE" "7" "01/23/2019" "\ \&" "\ \&"
 .\" -----------------------------------------------------------------
 .\" * Define some portability stuff
 .\" -----------------------------------------------------------------
@@ -257,9 +257,9 @@ T}
 1000 is an aggressive value for trying to minimize timeouts at all costs\&.
 .SH "RETURN VALUE"
 .sp
-On success, a "route" array is returned\&. Each array element contains
+On success, a "route" array is returned\&. Each array element contains \fIid\fR (the node being routed through), \fImsatoshi\fR (the millisatoshis sent), and \fIdelay\fR (the number of blocks to timeout at this node)\&.
 .sp
-timeout for the payment failure, in blocks\&.
+The final \fIid\fR will be the destination \fIid\fR given in the input\&. The difference between the first \fImsatoshi\fR minus the \fImsatoshi\fR given in the input is the fee\&. The first \fIdelay\fR is the very worst case timeout for the payment failure, in blocks\&.
 .SH "AUTHOR"
 .sp
 Rusty Russell <rusty@rustcorp\&.com\&.au> is mainly responsible\&.

doc/lightning-getroute.7.txt

@@ -95,13 +95,14 @@ costs.
 RETURN VALUE
 ------------
 
-On success, a "route" array is returned.  Each array element contains
-{id} (the node being routed through), {msatoshi} (the millisatoshis
-sent), and {delay} (the number of blocks to timeout at this node).
-
-The final {id} will be the destination {id} given in the input.  The
-difference between the first {msatoshi} minus the {msatoshi} given in
-the input is the fee.  The first {delay} is the very worst case
+On success, a "route" array is returned.
+Each array element contains 'id' (the node being routed through), 'msatoshi'
+(the millisatoshis sent), and 'delay' (the number of blocks to timeout at this
+node).
+
+The final 'id' will be the destination 'id' given in the input.  The
+difference between the first 'msatoshi' minus the 'msatoshi' given in
+the input is the fee.  The first 'delay' is the very worst case
 timeout for the payment failure, in blocks.
 
 //FIXME:Enumerate errors